diff --git a/intro_to_gurobipy/intro_to_gurobipy/intro_to_gurobipy.ipynb b/intro_to_gurobipy/intro_to_gurobipy/intro_to_gurobipy.ipynb
index 8f83ca4..50269bb 100644
--- a/intro_to_gurobipy/intro_to_gurobipy/intro_to_gurobipy.ipynb
+++ b/intro_to_gurobipy/intro_to_gurobipy/intro_to_gurobipy.ipynb
@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "markdown",
-   "id": "ff267917",
+   "id": "9985f7b1",
    "metadata": {
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      "slide_type": "slide"
@@ -19,7 +19,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c7add96f",
+   "id": "a66b4594",
    "metadata": {
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@@ -39,7 +39,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "becedc5b",
+   "id": "b319a3b4",
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@@ -57,7 +57,7 @@
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   {
    "cell_type": "markdown",
-   "id": "e6a335dc",
+   "id": "e5f5db7f",
    "metadata": {
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@@ -76,7 +76,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "bf8838b1",
+   "id": "5f92f0e2",
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@@ -97,7 +97,7 @@
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   {
    "cell_type": "markdown",
-   "id": "6a5efc36",
+   "id": "e3f02815",
    "metadata": {
     "slideshow": {
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@@ -135,7 +135,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "5b2738d7",
+   "id": "5eb49aef",
    "metadata": {
     "slideshow": {
      "slide_type": "slide"
@@ -156,7 +156,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "4a1cf970",
+   "id": "c51e50c5",
    "metadata": {
     "code_folding": [
      22
@@ -198,7 +198,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1db40407",
+   "id": "c6d94dcd",
    "metadata": {
     "slideshow": {
      "slide_type": "slide"
@@ -227,7 +227,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e0a8c8df",
+   "id": "f99590d2",
    "metadata": {
     "slideshow": {
      "slide_type": "slide"
@@ -258,7 +258,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "c4540670",
+   "id": "a5637577",
    "metadata": {
     "slideshow": {
      "slide_type": "fragment"
@@ -285,7 +285,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "4763eaef",
+   "id": "8a45c285",
    "metadata": {},
    "outputs": [],
    "source": [
@@ -297,7 +297,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "812389ed",
+   "id": "67191848",
    "metadata": {},
    "outputs": [],
    "source": [
@@ -311,7 +311,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "b1260ab8",
+   "id": "517262d6",
    "metadata": {
     "slideshow": {
      "slide_type": "fragment"
@@ -337,7 +337,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f2eba8ea",
+   "id": "87d60197",
    "metadata": {
     "slideshow": {
      "slide_type": "slide"
@@ -372,7 +372,7 @@
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   {
    "cell_type": "markdown",
-   "id": "d822c113",
+   "id": "dbd8d9ad",
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@@ -391,7 +391,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "3ece5640",
+   "id": "31c772ec",
    "metadata": {
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@@ -421,7 +421,7 @@
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   {
    "cell_type": "markdown",
-   "id": "39e336b8",
+   "id": "cb757e97",
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@@ -448,7 +448,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "00a3f876",
+   "id": "81839558",
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@@ -468,7 +468,7 @@
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   {
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-   "id": "da2b7c97",
+   "id": "51071459",
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@@ -495,7 +495,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "b39a6221",
+   "id": "b2948b40",
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@@ -534,7 +534,7 @@
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   {
    "cell_type": "markdown",
-   "id": "88c44161",
+   "id": "61214373",
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@@ -563,7 +563,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "600cc5c8",
+   "id": "87d043c9",
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@@ -608,7 +608,7 @@
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   {
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-   "id": "23e0adc0",
+   "id": "b49864fc",
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@@ -627,7 +627,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "1c2ea69a",
+   "id": "ee87d5e7",
    "metadata": {
     "slideshow": {
      "slide_type": "fragment"
@@ -655,7 +655,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "87741684",
+   "id": "c6e35294",
    "metadata": {
     "slideshow": {
      "slide_type": "slide"
@@ -678,7 +678,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "0774a681",
+   "id": "4e83785a",
    "metadata": {
     "slideshow": {
      "slide_type": "fragment"
@@ -723,7 +723,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "af44c698",
+   "id": "82e22abf",
    "metadata": {
     "slideshow": {
      "slide_type": "slide"
@@ -740,7 +740,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "49c1ecd3",
+   "id": "475ea4d5",
    "metadata": {
     "slideshow": {
      "slide_type": "fragment"
@@ -752,7 +752,7 @@
     "import gurobipy as gp\n",
     "from gurobipy import GRB\n",
     "\n",
-    "url = \"https://raw.githubusercontent.com/Gurobi/modeling-examples/master/intro_to_gurobipy/data/glass4.mps.bz2\"\n",
+    "url = \"https://raw.githubusercontent.com/Gurobi/modeling-examples/master/intro_to_gurobipy/intro_to_gurobipy/data/glass4.mps.bz2\"\n",
     "path_to_file, _ = urllib.request.urlretrieve(url, \"./glass4.mps.bz2\")\n",
     "\n",
     "# running notebook locally:\n",
@@ -774,7 +774,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "dca53115",
+   "id": "ca8ac2a1",
    "metadata": {
     "slideshow": {
      "slide_type": "slide"
@@ -788,7 +788,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "61277a1d",
+   "id": "8d5f7434",
    "metadata": {
     "slideshow": {
      "slide_type": "fragment"
@@ -800,7 +800,7 @@
     "import gurobipy as gp\n",
     "from gurobipy import GRB\n",
     "\n",
-    "url = \"https://raw.githubusercontent.com/Gurobi/modeling-examples/master/intro_to_gurobipy/data/glass4.mps.bz2\"\n",
+    "url = \"https://raw.githubusercontent.com/Gurobi/modeling-examples/master/intro_to_gurobipy/intro_to_gurobipy/data/glass4.mps.bz2\"\n",
     "path_to_file, _ = urllib.request.urlretrieve(url, \"./glass4.mps.bz2\")\n",
     "\n",
     "# running notebook locally:\n",
@@ -813,7 +813,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f3c629c6",
+   "id": "97615d56",
    "metadata": {
     "slideshow": {
      "slide_type": "slide"
@@ -858,7 +858,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "66195906",
+   "id": "5e1ba317",
    "metadata": {
     "slideshow": {
      "slide_type": "fragment"
@@ -912,7 +912,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "11d889db",
+   "id": "a2314369",
    "metadata": {
     "slideshow": {
      "slide_type": "slide"
@@ -940,7 +940,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "9a94383c",
+   "id": "18a48e9e",
    "metadata": {
     "slideshow": {
      "slide_type": "fragment"
@@ -952,7 +952,7 @@
     "from urllib.request import urlopen\n",
     "import numpy as np\n",
     "\n",
-    "url = \"https://raw.githubusercontent.com/Gurobi/modeling-examples/master/intro_to_gurobipy/data/portfolio-example.json\"\n",
+    "url = \"https://raw.githubusercontent.com/Gurobi/modeling-examples/master/intro_to_gurobipy/intro_to_gurobipy/data/portfolio-example.json\"\n",
     "response = urlopen(url)\n",
     "data = json.loads(response.read())\n",
     "\n",
@@ -966,7 +966,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "e47a1de3",
+   "id": "3d1519b2",
    "metadata": {
     "slideshow": {
      "slide_type": "fragment"
@@ -1020,7 +1020,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d132cb20",
+   "id": "48c99d33",
    "metadata": {
     "slideshow": {
      "slide_type": "slide"
@@ -1038,7 +1038,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8e29bb28",
+   "id": "5e8e9773",
    "metadata": {
     "slideshow": {
      "slide_type": "slide"
@@ -1053,7 +1053,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8150f61c",
+   "id": "44aff1db",
    "metadata": {
     "slideshow": {
      "slide_type": "slide"