diff --git a/for-loops.ipynb b/for-loops.ipynb
index d8dc735..2950572 100644
--- a/for-loops.ipynb
+++ b/for-loops.ipynb
@@ -304,11 +304,69 @@
     "\n",
     "Matthes 2023, p. 67, Exercise 4-13."
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 28,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "('fries', 'noodles', 'burgers', 'salad', 'wings')\n",
+      "fries\n",
+      "noodles\n",
+      "burgers\n",
+      "salad\n",
+      "wings\n"
+     ]
+    },
+    {
+     "ename": "TypeError",
+     "evalue": "'tuple' object does not support item assignment",
+     "output_type": "error",
+     "traceback": [
+      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
+      "\u001b[0;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
+      "Cell \u001b[0;32mIn[28], line 13\u001b[0m\n\u001b[1;32m     10\u001b[0m     \u001b[38;5;28mprint\u001b[39m(food)\n\u001b[1;32m     12\u001b[0m \u001b[38;5;66;03m#Try to modify one of the items and get rejected\u001b[39;00m\n\u001b[0;32m---> 13\u001b[0m \u001b[43mfoods\u001b[49m\u001b[43m[\u001b[49m\u001b[38;5;124;43m\"\u001b[39;49m\u001b[38;5;124;43mfries\u001b[39;49m\u001b[38;5;124;43m\"\u001b[39;49m\u001b[43m]\u001b[49m \u001b[38;5;241m=\u001b[39m \u001b[38;5;124m\"\u001b[39m\u001b[38;5;124mtacos\u001b[39m\u001b[38;5;124m\"\u001b[39m\n\u001b[1;32m     14\u001b[0m \u001b[38;5;28mprint\u001b[39m(foods)\n\u001b[1;32m     16\u001b[0m \u001b[38;5;66;03m#Menu change replacing two items\u001b[39;00m\n",
+      "\u001b[0;31mTypeError\u001b[0m: 'tuple' object does not support item assignment"
+     ]
+    }
+   ],
+   "source": [
+    "#Exercises 4-13 in Matthes 2023, p. 67\n",
+    "\n",
+    "#Storing five basic foods in a tuple\n",
+    "foods = (\"fries\", \"noodles\", \"burgers\", \"salad\", \"wings\")\n",
+    "print(foods)\n",
+    "\n",
+    "\n",
+    "#For loop to print each restaurant's offerings\n",
+    "for food in foods:\n",
+    "    print(food)\n",
+    "\n",
+    "#Try to modify one of the items and get rejected\n",
+    "foods[\"fries\"] = \"tacos\"\n",
+    "print(foods)\n",
+    "\n",
+    "#Menu change replacing two items\n",
+    "foods = (\"fries\", \"noodles\", \"burgers\", \"salad\", \"wings\")\n",
+    "print(\"\\nOriginal menu:\")\n",
+    "for food in foods:\n",
+    "    print(food)\n",
+    "\n",
+    "foods = (\"fries\", \"chicken\", \"burgers\", \"salad\", \"dips\")\n",
+    "print(\"\\nModified menu:\")\n",
+    "for food in foods:\n",
+    "    print(food)\n",
+    "\n"
+   ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": ".venv",
+   "display_name": "Python 3",
    "language": "python",
    "name": "python3"
   },
@@ -322,7 +380,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.12.7"
+   "version": "3.12.1"
   }
  },
  "nbformat": 4,