diff --git a/lab-python-flow-control.ipynb b/lab-python-flow-control.ipynb
index f4c7391..e0b46e9 100644
--- a/lab-python-flow-control.ipynb
+++ b/lab-python-flow-control.ipynb
@@ -37,11 +37,108 @@
     "\n",
     "3. Instead of updating the inventory by subtracting 1 from the quantity of each product, only do it for  the products that were ordered (those in \"customer_orders\")."
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "299271f0",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{'t-shirt': 7, 'mug': 6, 'hat': 5, 'book': 4, 'keychain': 3}"
+      ]
+     },
+     "execution_count": 13,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# 1. \n",
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
+    "inventory = {}\n",
+    "\n",
+    "for product in products:\n",
+    "    quantity = int(input(f\"Enter the quantity for {product}: \"))\n",
+    "    inventory[product] = quantity\n",
+    "    \n",
+    "inventory\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 14,
+   "id": "341d09de",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "customer_orders = set()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "485efe3e",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{'book', 'hat', 'mug'}"
+      ]
+     },
+     "execution_count": 15,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "  \n",
+    "    #a. \n",
+    "    #b. \n",
+    "    #c. \n",
+    "    #d. \n",
+    "add_another = 'yes'\n",
+    "\n",
+    "while add_another == 'yes':\n",
+    "    product_name = input(\"Enter the name of a product that a customer wants to order: \")\n",
+    "    customer_orders.add(product_name)\n",
+    "\n",
+    "    add_another = input(\"Do you want to add another product? (yes/no): \")\n",
+    "\n",
+    "customer_orders"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "2d07b66f",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "products in customer_orders: {'mug', 'book', 'hat'}\n",
+      "updated inventory: {'t-shirt': 7, 'mug': 5, 'hat': 4, 'book': 3, 'keychain': 3}\n"
+     ]
+    }
+   ],
+   "source": [
+    "#3. \n",
+    "for product in customer_orders:\n",
+    "        inventory[product] -= 1\n",
+    "\n",
+    "print(\"products in customer_orders:\", customer_orders)\n",
+    "print(\"updated inventory:\", inventory)"
+   ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "Python 3",
    "language": "python",
    "name": "python3"
   },
@@ -55,7 +152,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.7"
   }
  },
  "nbformat": 4,