diff --git a/lab-python-functions.ipynb b/lab-python-functions.ipynb
index 44d337b..85a0b35 100644
--- a/lab-python-functions.ipynb
+++ b/lab-python-functions.ipynb
@@ -43,6 +43,254 @@
     "\n",
     "\n"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 19,
+   "id": "ab63b15e-b917-4ac1-bcac-debf233ee5ba",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "['t-shirt', 'mug', 'hat', 'book', 'keychain']"
+      ]
+     },
+     "execution_count": 19,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
+    "products"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 20,
+   "id": "72cd0621-a051-47a1-ad73-01924a7ce63f",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# 1.\n",
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "    for product in products:\n",
+    "        value = int(input(f\"Number of {product}:\"))\n",
+    "        inventory[product] = value\n",
+    "    return inventory\n",
+    "    "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 21,
+   "id": "4f678249-6797-4c16-a3b2-5d71279746a0",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# 2.\n",
+    "def get_customer_orders():\n",
+    "    customer_orders = set()\n",
+    "    continue_adding = \"yes\"\n",
+    "\n",
+    "    while continue_adding == \"yes\":\n",
+    "        product = input(\"Enter the name of a product: \")\n",
+    "        product = product.lower()\n",
+    "\n",
+    "        if product in products: \n",
+    "            customer_orders.add(product) \n",
+    "        else:\n",
+    "            print(\"This product is not available\")\n",
+    "        continue_adding = input(\"Do you want to continue adding products? yes/no: \").lower() \n",
+    "        \n",
+    "    return customer_orders"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 22,
+   "id": "978093db-0e85-4a90-aaa2-388eccd49635",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# 3.\n",
+    "def update_inventory(customer_orders,inventory):\n",
+    "    for product in customer_orders: \n",
+    "      inventory[product] = inventory[product]-1\n",
+    "    return inventory "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 23,
+   "id": "3aa06beb-e5d3-4e5e-a79a-ff5a7d886ec4",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# 4.\n",
+    "def calculate_order_statistics(customer_orders, products):\n",
+    "    total = (len(customer_orders))\n",
+    "    percentage = len(customer_orders)/len(products)*100\n",
+    "    order_status = (total, percentage)\n",
+    "    return order_status\n",
+    "    "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 24,
+   "id": "f1d59ae8-88ac-4bb9-a4c9-2968595dbae7",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# 5.\n",
+    "def print_order_statistics(order_statistics):\n",
+    "    print(\"Order Statistics:\")\n",
+    "    print(f\"Total products ordered: {order_statistics[0]}\")\n",
+    "    print(f\"Percentage of products ordered: {order_statistics[1]}%\")\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 25,
+   "id": "f9fc6b12-680f-4ed2-85a5-7832feeb3586",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# 6.\n",
+    "def print_updated_inventory(inventory):\n",
+    "    print(inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 26,
+   "id": "2034ce46-aa75-42cd-b78f-f0d8d798900f",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Number of t-shirt: 10\n",
+      "Number of mug: 10\n",
+      "Number of hat: 10\n",
+      "Number of book: 10\n",
+      "Number of keychain: 10\n"
+     ]
+    }
+   ],
+   "source": [
+    "inventory = initialize_inventory(products)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 27,
+   "id": "3161c44f-fd7a-4a51-a855-99060f8f6220",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Enter the name of a product:  Mug\n",
+      "Do you want to continue adding products? yes/no:  yes\n",
+      "Enter the name of a product:  banana\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "This product is not available\n"
+     ]
+    },
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Do you want to continue adding products? yes/no:  Yes\n",
+      "Enter the name of a product:  Hat\n",
+      "Do you want to continue adding products? yes/no:  yes\n",
+      "Enter the name of a product:  mug\n",
+      "Do you want to continue adding products? yes/no:  yes\n",
+      "Enter the name of a product:  Book\n",
+      "Do you want to continue adding products? yes/no:  No\n"
+     ]
+    }
+   ],
+   "source": [
+    "customer_orders = get_customer_orders()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 31,
+   "id": "30874f15-ed48-499f-bc84-b4634333c749",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "inventory = update_inventory(customer_orders, inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 32,
+   "id": "e07bd44d-2c32-4560-a4a9-233663865f57",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "order_statistics = calculate_order_statistics(customer_orders, products)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 33,
+   "id": "f5685b28-2cd8-4679-96cb-ae2b4d149c23",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Order Statistics:\n",
+      "Total products ordered: 3\n",
+      "Percentage of products ordered: 60.0%\n"
+     ]
+    }
+   ],
+   "source": [
+    "print_order_statistics(order_statistics)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 34,
+   "id": "b6406f7a-c63d-4faa-b4e3-df4778b186f5",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{'t-shirt': 10, 'mug': 8, 'hat': 8, 'book': 8, 'keychain': 10}\n"
+     ]
+    }
+   ],
+   "source": [
+    "print_updated_inventory(inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "ac190a99-2b36-4acc-a1ec-eebb2268936d",
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {
@@ -61,7 +309,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.5"
   }
  },
  "nbformat": 4,