diff --git a/1/1_2.sh b/1/1_2.sh
index b8a3b4f..d3d9d55 100644
--- a/1/1_2.sh
+++ b/1/1_2.sh
@@ -1,4 +1,3 @@
-
 npm version
 npm install -g m
 m latest
@@ -7,4 +6,4 @@ brew tap mongodb/brew
 brew install mongosh
 mongosh --version
 brew install mongodb-database-tools
-mongoimport
+mongoimport
\ No newline at end of file
diff --git a/1/1_3.sh b/1/1_3.sh
index ae8c559..10f3c31 100644
--- a/1/1_3.sh
+++ b/1/1_3.sh
@@ -2,6 +2,4 @@ npm version
 sudo npm install -g m
 m latest
 mongod --version
-docs.mongodb.com/mongodb-shell/install/
-
-sudo apt-get install mongodb-database-tools
+sudo apt-get install mongodb-database-tools
\ No newline at end of file
diff --git a/1/1_4.sh b/1/1_4.sh
index ae8c559..10f3c31 100644
--- a/1/1_4.sh
+++ b/1/1_4.sh
@@ -2,6 +2,4 @@ npm version
 sudo npm install -g m
 m latest
 mongod --version
-docs.mongodb.com/mongodb-shell/install/
-
-sudo apt-get install mongodb-database-tools
+sudo apt-get install mongodb-database-tools
\ No newline at end of file
diff --git a/1/2_1.sh b/1/2_1.sh
deleted file mode 100644
index ae8c559..0000000
--- a/1/2_1.sh
+++ /dev/null
@@ -1,7 +0,0 @@
-npm version
-sudo npm install -g m
-m latest
-mongod --version
-docs.mongodb.com/mongodb-shell/install/
-
-sudo apt-get install mongodb-database-tools
diff --git a/1/2_3.sh b/1/2_3.sh
deleted file mode 100644
index ae8c559..0000000
--- a/1/2_3.sh
+++ /dev/null
@@ -1,7 +0,0 @@
-npm version
-sudo npm install -g m
-m latest
-mongod --version
-docs.mongodb.com/mongodb-shell/install/
-
-sudo apt-get install mongodb-database-tools
diff --git a/2/2_1.sh b/2/2_1.sh
new file mode 100644
index 0000000..e31f921
--- /dev/null
+++ b/2/2_1.sh
@@ -0,0 +1,7 @@
+mkdir mongodbessentials
+cd mongodbessentials
+mkdir mongod_only
+mongod --dbpath mongod_only
+mongosh
+show databases
+db.test.insertOne({"hello": "world"})
\ No newline at end of file
diff --git a/2/2_3.sh b/2/2_3.sh
new file mode 100644
index 0000000..c3853ac
--- /dev/null
+++ b/2/2_3.sh
@@ -0,0 +1,18 @@
+mkdir replica_set_cmdline
+cd replica_set_cmdline
+openssl rand -base64 755 > keyfile
+chmod 400 keyfile
+mkdir -p m{1,2,3}/db
+mongod --replSet myReplSet --dbpath ./m1/db --logpath ./m1/mongodb.log --port 27017 --fork --keyFile ./keyfile
+mongod --replSet myReplSet --dbpath ./m2/db --logpath ./m2/mongodb.log --port 27018 --fork --keyFile ./keyfile
+mongod --replSet myReplSet --dbpath ./m3/db --logpath ./m3/mongodb.log --port 27019 --fork --keyFile ./keyfile
+mongosh “mongodb://localhost:27017”
+rs.initiate()
+use admin
+db.createUser({user: 'naomi', pwd: passwordPrompt(), roles: ["root"]})
+db.getSiblingDB("admin").auth("naomi", passwordPrompt())
+rs.add("localhost:27018")
+rs.add("localhost:27019")
+rs.status()
+db.serverStatus()['repl']
+rm -rf mongodbessentials
\ No newline at end of file
diff --git a/2/2_4.sh b/2/2_4.sh
new file mode 100644
index 0000000..ae30424
--- /dev/null
+++ b/2/2_4.sh
@@ -0,0 +1,28 @@
+mkdir replicaset
+cd replicaset
+openssl rand -base64 755 > keyfile
+chmod 400 keyfile
+mkdir -p m{1,2,3}/db
+touch m1.conf
+cp m1.conf m2.conf
+cp m1.conf m3.conf
+mongod -f m1.conf
+mongod -f m2.conf
+mongod -f m3.conf
+mongosh
+use admin
+config = {
+    _id: "mongodb-essential-rs",
+    members: [
+        { _id: 0, host: "localhost:27017" },
+        { _id: 1, host: "localhost:27018" },
+        { _id: 2, host: "localhost:27019" }
+    ]
+};
+rs.initiate(config)
+db.createUser({user: 'naomi', pwd: passwordPrompt(), roles: ["root"]})
+db.getSiblingDB("admin").auth("naomi")
+rs.add("localhost:27018")
+rs.add("localhost:27019")
+rs.status()
+db.serverStatus()['repl']
\ No newline at end of file
diff --git a/2/2_5.sh b/2/2_5.sh
new file mode 100644
index 0000000..db07f79
--- /dev/null
+++ b/2/2_5.sh
@@ -0,0 +1,4 @@
+cd datasets
+mongoimport --username="naomi" --authenticationDatabase="admin" --db=sample_data inventory.json
+mongoimport --username="naomi" --authenticationDatabase="admin" --db=sample_data movies.json
+mongoimport --username="naomi" --authenticationDatabase="admin" --db=sample_data orders.json
\ No newline at end of file
diff --git a/2/m1.conf b/2/m1.conf
new file mode 100644
index 0000000..9474282
--- /dev/null
+++ b/2/m1.conf
@@ -0,0 +1,15 @@
+storage:
+    dbPath: m1/db
+net:
+    bindIp: localhost
+    port: 27017
+security:
+    authorization: enabled
+    keyFile: keyfile
+systemLog:
+    destination: file
+    path: m1/mongod.log
+processManagement:
+    fork: true
+replication:
+    replSetName: mongodb-essentials-rs
\ No newline at end of file
diff --git a/2/m2.conf b/2/m2.conf
new file mode 100644
index 0000000..0135773
--- /dev/null
+++ b/2/m2.conf
@@ -0,0 +1,15 @@
+storage:
+    dbPath: m2/db
+net:
+    bindIp: localhost
+    port: 27018
+security:
+    authorization: enabled
+    keyFile: keyfile
+systemLog:
+    destination: file
+    path: m2/mongod.log
+processManagement:
+    fork: true
+replication:
+    replSetName: mongodb-essentials-rs
\ No newline at end of file
diff --git a/2/m3.conf b/2/m3.conf
new file mode 100644
index 0000000..189b6a8
--- /dev/null
+++ b/2/m3.conf
@@ -0,0 +1,15 @@
+storage:
+    dbPath: m3/db
+net:
+    bindIp: localhost
+    port: 27019
+security:
+    authorization: enabled
+    keyFile: keyfile
+systemLog:
+    destination: file
+    path: m3/mongod.log
+processManagement:
+    fork: true
+replication:
+    replSetName: mongodb-essentials-rs
\ No newline at end of file
diff --git a/3/3_2.sh b/3/3_2.sh
new file mode 100644
index 0000000..4bf1100
--- /dev/null
+++ b/3/3_2.sh
@@ -0,0 +1,3 @@
+use blog
+show collections
+db.authors.insertOne({"name": "Naomi Pentrel"})
\ No newline at end of file
diff --git a/3/3_3.sh b/3/3_3.sh
new file mode 100644
index 0000000..6181def
--- /dev/null
+++ b/3/3_3.sh
@@ -0,0 +1,20 @@
+db.authors.insertOne({"name": "Joe Nash"})
+db.authors.insertMany([
+    {"name": "Eliot Horowitz"},
+    {"name": "Dwight Merriman"},
+    {"name": "Kevin P. Ryan"}
+])
+db.authors.find()
+db.authors.find({ "name": "Naomi Pentrel"})
+db.authors.find({ name: "Naomi Pentrel"})
+db.authors.updateOne(
+    { name: "Naomi Pentrel"},
+    { $set: { website: "https://naomi.codes" } }
+)
+db.authors.find({ name: "Naomi Pentrel"})
+db.authors.updateMany(
+    { },
+    { $set: { books: [] } }
+)
+db.authors.find()
+db.authors.deleteOne({ name: "Joe Nash" })
\ No newline at end of file
diff --git a/3/3_4.sh b/3/3_4.sh
new file mode 100644
index 0000000..9b34de0
--- /dev/null
+++ b/3/3_4.sh
@@ -0,0 +1,2 @@
+db.authors.find()
+db.createIndex({ name: 1 })
\ No newline at end of file
diff --git a/3/3_6.sh b/3/3_6.sh
new file mode 100644
index 0000000..626c80a
--- /dev/null
+++ b/3/3_6.sh
@@ -0,0 +1,10 @@
+use lookup
+db.records.insert({
+    "name": "Naomi Pentrel",
+    "number": "1234567890",
+    "profession": "LinkedIn Learning Instructor",
+    "website": "naomi.codes"
+})
+db.records.findOne()
+db.records.createIndex({name: 1})
+db.records.createIndex({number: 1})
\ No newline at end of file
diff --git a/3/script.sh b/3/script.sh
deleted file mode 100644
index e69de29..0000000
diff --git a/4/4_11.sh b/4/4_11.sh
new file mode 100644
index 0000000..b2ba0ab
--- /dev/null
+++ b/4/4_11.sh
@@ -0,0 +1,67 @@
+use order_app
+db.oders.insertMany([
+    {
+        "time": Date(),
+        "items": [{
+            "name": "Fries",
+            "quantity": 1,
+            "price": 2.99
+        },{
+            "name": "Diet Coke",
+            "quantity": 1,
+            "price": 1.99
+        }],
+        "delivery_cost": 3.50,
+        "total": 8.48,
+        "user": {
+            "name": "Naomi Pentrel",
+            "address": "Sample Street 123",
+            "email": "naomi@email.com",
+            "phone": "12345678910",
+            "balance": 10
+        },
+        "restaurant": {
+            "name": "Burger King",
+            "address": "Somewhere in Amsterdam"
+        }
+    },
+    {
+        "time": Date(),
+        "items": [{
+            "name": "Fries",
+            "quantity": 1,
+            "price": 2.99
+        },{
+            "name": "Diet Coke",
+            "quantity": 2,
+            "price": 1.99
+        }],
+        "delivery_cost": 3.50,
+        "total": 10.47,
+        "user": {
+            "name": "Naomi Pentrel",
+            "address": "Sample Street 123",
+            "email": "naomi@email.com",
+            "phone": "12345678910",
+            "balance": 10
+        },
+        "restaurant": {
+            "name": "Burger King",
+            "address": "Somewhere in Amsterdam"
+        }
+    }
+])
+db.orders.findOne()
+db.orders.createIndex({"user.email": 1, time: 1})
+db.orders.createIndex({"restaurant.name": 1, time: 1})
+db.orders.find().sort({total: -1}).limit(1)
+db.orders.find().sort({"restaurant.name": 1})
+db.orders.find({
+    $expr: {
+        $gt: [
+            "$total",
+            "$user.balance"
+        ]
+    }
+})
+db.orders.updateMany({}, { $mul: {total: 0.9} })
diff --git a/4/4_2.sh b/4/4_2.sh
new file mode 100644
index 0000000..98c9869
--- /dev/null
+++ b/4/4_2.sh
@@ -0,0 +1,7 @@
+use sample_data
+show collections
+db.inventory.findOne()
+db.orders.findOne()
+db.movies.findOne()
+db.movies.findOne({"ratings.mndb": 10})
+db.movies.findOne({"genres.0": "Musical"})
\ No newline at end of file
diff --git a/4/4_3.sh b/4/4_3.sh
new file mode 100644
index 0000000..028eaa4
--- /dev/null
+++ b/4/4_3.sh
@@ -0,0 +1,11 @@
+use sample_data
+db.inventory.findOne()
+db.inventory.findOne({ "variations.quantity": { $gte: 8 } })
+db.inventory.findOne({ "variations.quantity": { $gte: 17 } })
+db.inventory.findOne({ "variations.quantity": { $gte: 18 } })
+db.inventory.findOne({ "variations.quantity": { $gte: 22 } })
+db.inventory.findOne({ "price": { $lt: 1000 } })
+db.inventory.findOne({ "price": { $lt: 2000 } })
+db.inventory.findOne({ "price": { $lt: 1700 } })
+db.inventory.findOne({ "variations.variation": { $in: [ "Blue", "Red" ] } })
+db.inventory.findOne({ "variations.variation": { $nin: [ "Blue", "Red" ] } })
\ No newline at end of file
diff --git a/4/4_4.sh b/4/4_4.sh
new file mode 100644
index 0000000..eb0d127
--- /dev/null
+++ b/4/4_4.sh
@@ -0,0 +1,32 @@
+use sample_data
+db.inventory.findOne()
+db.inventory.findOne(
+    {
+        $and: [
+            { "variations.quantity": { $ne: 0} },
+            { "variations.quantity": { $exists: true } }
+        ]
+    }
+)
+db.inventory.findOne(
+    {
+        $or: [
+            { "variations.variation": "Blue" },
+            { "variations.variation": "Green" }
+            { "variations.variation": "Teal" },
+        ]
+    }
+)
+db.inventory.findOne(
+    {
+        $nor: [
+            { price: { $gt: 8000 } },
+            { "variations.variation": "Blue" }
+        ]
+    }
+)
+db.inventory.findOne(
+    {
+        $not: { price: { $gt: 20000 } },
+    }
+)
\ No newline at end of file
diff --git a/4/4_5.sh b/4/4_5.sh
new file mode 100644
index 0000000..b2e16ff
--- /dev/null
+++ b/4/4_5.sh
@@ -0,0 +1,6 @@
+db.movies.find().sort({title: 1})
+db.movies.find({}, { title: 1, genres: 1 }).sort( {title: 1})
+db.movies.find({}, { title: 1, genres: 1 }).sort( {title: -1})
+db.movies.find({}, { title: 1, genres: 1 }).sort( {director: 1, title: 1})
+db.movies.find({}, { title: 1, genres: 1 }).sort( {title: 1}).skip(100)
+db.movies.find({}, { title: 1, genres: 1 }).sort( {title: 1}).skip(100).limit(5)
diff --git a/4/4_6.sh b/4/4_6.sh
new file mode 100644
index 0000000..05c4941
--- /dev/null
+++ b/4/4_6.sh
@@ -0,0 +1,18 @@
+use blog
+show collections
+db.authors.find()
+db.authors.updateOne(
+    { name: "Naomi Pentrel" },
+    { $set: { message: "Hello World!" } }
+)
+db.authors.find()
+db.authors.updateMany(
+    {},
+    { $set: { message: "Hello" } }
+)
+db.authors.find()
+db.authors.updateMany(
+    {},
+    { $unset: { message: "" } }
+)
+db.authors.find()
diff --git a/4/4_7.sh b/4/4_7.sh
new file mode 100644
index 0000000..6cd696b
--- /dev/null
+++ b/4/4_7.sh
@@ -0,0 +1,62 @@
+use sample_data
+db.movies.findOne()
+db.movies.find({genres: "Comedy"})
+db.movies.find({genres: ["Comedy", "Drama", "Thriller"]})
+db.movies.find({genres: { $all: ["Comedy", "Drama"] } })
+db.inventory.findOne()
+db.inventory.find(
+    {
+        variations: {
+            $elemMatch: {
+                variation: "Blue",
+                quantity: { $gt: 8  }
+            }
+        }
+    }
+)
+db.movies.findOne()
+db.movies.updateOne(
+    {
+        title: 'The Adventures of Tom Thumb & Thumbelina'
+    },
+    {
+        $push: { genres: "Test" }
+    }
+)
+db.movies.findOne( {title: 'The Adventures of Tom Thumb & Thumbelina'} )
+db.movies.updateOne(
+    {
+        title: 'The Adventures of Tom Thumb & Thumbelina'
+    },
+    {
+        $addToSet: { genres: "Test" }
+    }
+)
+db.movies.findOne( {title: 'The Adventures of Tom Thumb & Thumbelina'} )
+db.movies.updateOne(
+    {
+        title: 'The Adventures of Tom Thumb & Thumbelina'
+    },
+    {
+        $addToSet: { genres: "Green" }
+    }
+)
+db.movies.findOne( {title: 'The Adventures of Tom Thumb & Thumbelina'} )
+db.movies.updateOne(
+    {
+        title: 'The Adventures of Tom Thumb & Thumbelina'
+    },
+    {
+        $pop: { genres: 1 }
+    }
+)
+db.movies.findOne( {title: 'The Adventures of Tom Thumb & Thumbelina'} )
+db.movies.updateOne(
+    {
+        title: 'The Adventures of Tom Thumb & Thumbelina'
+    },
+    {
+        $pop: { genres: 1 }
+    }
+)
+db.movies.findOne( {title: 'The Adventures of Tom Thumb & Thumbelina'} )
diff --git a/4/4_8.sh b/4/4_8.sh
new file mode 100644
index 0000000..a22d0b9
--- /dev/null
+++ b/4/4_8.sh
@@ -0,0 +1,7 @@
+use blog
+session = db.getMongo().startSession( { readPreference: { mode: "primary" } } )
+session.startTransaction()
+session.getDatabase("blog").updateMany( {}, {$set: {message: "Transaction occured"} } )
+session.commitTransaction()
+session.endSession()
+db.authors.find()
\ No newline at end of file
diff --git a/4/4_9.sh b/4/4_9.sh
new file mode 100644
index 0000000..df49b45
--- /dev/null
+++ b/4/4_9.sh
@@ -0,0 +1,6 @@
+use sample_data
+db.movies.findOne()
+db.movies.find({ title: 1, ratings: 1 })
+db.movies.find(
+    { title: 1, ratings: 1 }
+)
diff --git a/4/script.sh b/4/script.sh
deleted file mode 100644
index e69de29..0000000
diff --git a/5/5_10.sh b/5/5_10.sh
new file mode 100644
index 0000000..a7ece81
--- /dev/null
+++ b/5/5_10.sh
@@ -0,0 +1,18 @@
+db.mock_movie_data.aggregate([
+    { $project: {
+        release_year: { $year: "$release_year" },
+        genres: 1,
+        runtime_min: 1,
+        title: 1
+    } },
+    { $match: { release_year: { $gte: 2000 } } },
+    { $unwind: "$genres"},
+    { $group: {
+        _id: {
+            genres: "$genres",
+        },
+        movies: { $push: { title: "$title", runtime_min: "$runtime_min", release_year: "$release_year"} },
+        count: { $sum: 1 }
+    } },
+    { $out: { db: "sample_data", coll: "genres2000" } }
+])
\ No newline at end of file
diff --git a/5/5_2.sh b/5/5_2.sh
new file mode 100644
index 0000000..6dd3ec2
--- /dev/null
+++ b/5/5_2.sh
@@ -0,0 +1,36 @@
+use sample_data
+db.inventory.findOne()
+db.inventory.aggregate( [
+    {
+        $group: {
+            _id: "$source",
+        }
+    }
+] )
+db.inventory.aggregate( [
+    {
+        $group: {
+            _id: "$source",
+            count: { $sum: 1 }
+        }
+    }
+] )
+db.inventory.aggregate( [
+    {
+        $group: {
+            _id: "$source",
+            count: { $sum: 1 },
+            items: { $push: "$name" }
+        }
+    }
+] )
+db.inventory.aggregate( [
+    {
+        $group: {
+            _id: "$source",
+            count: { $sum: 1 },
+            items: { $push: "$name" },
+            avg_price: { $avg: "$price"}
+        }
+    }
+] )
\ No newline at end of file
diff --git a/2/script.sh b/5/5_3.sh
similarity index 100%
rename from 2/script.sh
rename to 5/5_3.sh
diff --git a/5/5_4.sh b/5/5_4.sh
new file mode 100644
index 0000000..4fe9cbd
--- /dev/null
+++ b/5/5_4.sh
@@ -0,0 +1,26 @@
+db.inventory.findOne()
+db.inventory.aggregate( [
+    {
+        $unwind: "$variations"
+    }
+] )
+db.inventory.findOne()
+db.inventory.aggregate( [
+    {
+        $unwind: "$variations",
+    },
+    {
+        $match: { "variations.variation": "Purple" }
+    }
+] )
+db.inventory.aggregate( [
+    {
+        $match: { "variations.variation": "Purple" }
+    },
+    {
+        $unwind: "$variations",
+    },
+    {
+        $match: { "variations.variation": "Purple" }
+    }
+] )
diff --git a/5/5_5.sh b/5/5_5.sh
new file mode 100644
index 0000000..2ac53c8
--- /dev/null
+++ b/5/5_5.sh
@@ -0,0 +1,35 @@
+db.inventory.aggregate( [
+    {
+        $match: { "variations.variation": "Purple" }
+    },
+    {
+        $unwind: "$variations",
+    },
+    {
+        $match: { "variations.variation": "Purple" }
+    },
+    {
+        $out: { db: "sample_data", coll: "purple" }
+    }
+] )
+show collections
+db.purple.find()
+db.inventory.aggregate( [
+    {
+        $match: { "variations.variation": "Purple" }
+    },
+    {
+        $unwind: "$variations",
+    },
+    {
+        $match: { "variations.variation": "Purple" }
+    },
+    {
+        $merge: {
+            into: "purple",
+            on: "_id",
+            whenMatched: "keepExisting"
+            whenNotMatched: "insert"
+        }
+    }
+] )
diff --git a/5/5_6.sh b/5/5_6.sh
new file mode 100644
index 0000000..d13545a
--- /dev/null
+++ b/5/5_6.sh
@@ -0,0 +1,15 @@
+db.movies.findOne()
+db.movies.aggregate([
+    {
+        $project: {
+            title: 1,
+            actors: {
+                $function: {
+                    body: 'function(actors) { return actors.sort(); }',
+                    args: [ "$actors" ],
+                    lang: "js"
+                }
+            }
+        }
+    }
+])
\ No newline at end of file
diff --git a/5/5_7.sh b/5/5_7.sh
new file mode 100644
index 0000000..0ab148d
--- /dev/null
+++ b/5/5_7.sh
@@ -0,0 +1,8 @@
+db.orders.aggregate([
+     { $lookup: {
+            from: "inventory",
+            localField: "car_id",
+            foreignField: "_id",
+            as: "car_id"
+     } }
+])
\ No newline at end of file
diff --git a/5/5_8.sh b/5/5_8.sh
new file mode 100644
index 0000000..6c4c315
--- /dev/null
+++ b/5/5_8.sh
@@ -0,0 +1,12 @@
+db.movies.explain("executionStats").aggregate( [
+     { $project: {
+          release_year: {$year: "$release_year"},
+          title: 1
+     } },
+     { $lookup: {
+          from: "inventory",
+          localField: "release_year",
+          foreignField: "year",
+          as: "year"
+     } }
+] )
\ No newline at end of file
diff --git a/5/script.sh b/5/script.sh
deleted file mode 100644
index e69de29..0000000
diff --git a/6/6_3.sh b/6/6_3.sh
new file mode 100644
index 0000000..4bf1100
--- /dev/null
+++ b/6/6_3.sh
@@ -0,0 +1,3 @@
+use blog
+show collections
+db.authors.insertOne({"name": "Naomi Pentrel"})
\ No newline at end of file
diff --git a/6/script.sh b/6/script.sh
deleted file mode 100644
index e69de29..0000000