diff --git a/src/functions-and-arrays.js b/src/functions-and-arrays.js
index ce8695c..77fb3d7 100644
--- a/src/functions-and-arrays.js
+++ b/src/functions-and-arrays.js
@@ -1,5 +1,16 @@
 // Iteration 1 | Find the Maximum
-function maxOfTwoNumbers() {}
+function maxOfTwoNumbers(num1,num2) {
+   if (num1 > num2){
+        return num1;
+   }
+   else if (num1 < num2){
+        return num2;
+   }
+   else{
+         return num1;
+   }
+
+}
 
 
 
@@ -7,7 +18,24 @@ function maxOfTwoNumbers() {}
 // Iteration 2 | Find the Longest Word
 const words = ["mystery", "brother", "aviator", "crocodile", "pearl", "orchard", "crackpot"];
 
-function findLongestWord() {}
+function findLongestWord(arr) {
+    let indexOfLongest = -1 ;
+    let lengthOfLongest = 0 ;
+    for(i=0 ; i < arr.length ; i++ ){
+        if(arr[i].length > lengthOfLongest){
+            lengthOfLongest = arr[i].length
+            indexOfLongest = i
+        }   
+    }
+
+    if (indexOfLongest === -1){
+        return null ;
+    }
+    else {
+        return arr[indexOfLongest];
+    }
+    
+}
 
 
 
@@ -15,7 +43,13 @@ function findLongestWord() {}
 // Iteration 3 | Sum Numbers
 const numbers = [6, 12, 1, 18, 13, 16, 2, 1, 8, 10];
 
-function sumNumbers() {}
+function sumNumbers(arr) {
+ let accum = 0 ;
+ for(i=0 ; i < arr.length ; i++ ){
+    accum += arr[i]
+ }
+return accum;
+}
 
 
 
@@ -23,7 +57,16 @@ function sumNumbers() {}
 // Iteration 4 | Numbers Average
 const numbers2 = [2, 6, 9, 10, 7, 4, 1, 9];
 
-function averageNumbers() {}
+function averageNumbers(arr) {
+ if (arr.length !== 0 && Array.isArray(arr) ) {
+    return sumNumbers(arr) / arr.length;
+ }
+ else {
+    return 0 ; 
+ }
+    
+
+}
 
 
 
@@ -31,4 +74,23 @@ function averageNumbers() {}
 // Iteration 5 | Find Elements
 const words2 = ["machine", "subset", "trouble", "starting", "matter", "eating", "truth", "disobedience"];
 
-function doesWordExist() {}
+function doesWordExist(arr, word) {
+    let isExists = false ;
+    if (arr.length !== 0 && Array.isArray(arr) ) {
+        for(i=0; i < arr.length ; i++) {
+            if( arr[i] === word ){ 
+                isExists = true ;
+                break ;
+            }    
+        }
+        
+     }
+     else {
+        isExists =  null ; 
+     }
+     return isExists;
+}
+
+
+
+// arr.forEach((item,word)=>{ if (item === word) { isExists = true; } else { isExists = false; } } )