diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb
index 3e50ef8..0bfdc5a 100644
--- a/lab-python-error-handling.ipynb
+++ b/lab-python-error-handling.ipynb
@@ -41,13 +41,143 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 10,
    "id": "cc2c441d-9dcf-4817-b097-cf6cbe440846",
    "metadata": {},
    "outputs": [],
    "source": [
-    "# your code goes here"
+    "products = ['t-shirt', 'mug', 'hat', 'book', 'keychain']\n",
+    "\n",
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "    for product in products:\n",
+    "        while True:\n",
+    "            try:\n",
+    "                quantity = int(input(f'Choose quantity of {product}: '))\n",
+    "                if quantity < 0:\n",
+    "                    raise ValueError(\"Quantity cannot be negative.\")\n",
+    "                inventory[product] = quantity\n",
+    "                break\n",
+    "            except ValueError as e:\n",
+    "                print(f\"Invalid input: {e}. Please enter a non-negative integer.\")\n",
+    "    return inventory\n",
+    "\n",
+    "def get_customer_orders(products):\n",
+    "    customer_orders = set()\n",
+    "\n",
+    "    while True:\n",
+    "        try:\n",
+    "            product = input(\"Enter the name of a product that the customer wants to order: \")\n",
+    "            if product not in products:\n",
+    "                raise ValueError(\"Invalid product name.\")\n",
+    "            customer_orders.add(product)\n",
+    "            answer = input(\"Do you want to add another product? (yes/no): \")\n",
+    "            if answer.lower() in ['no', 'n']:\n",
+    "                break\n",
+    "        except ValueError as e:\n",
+    "            print(e)\n",
+    "    return customer_orders\n",
+    "\n",
+    "def update_inventory(customer_orders, inventory):\n",
+    "    for product in customer_orders:\n",
+    "        try:\n",
+    "            if product in inventory:\n",
+    "                if inventory[product] > 0:\n",
+    "                    inventory[product] -= 1\n",
+    "                else:\n",
+    "                    print(f\"Out of stock for {product}.\")\n",
+    "            else:\n",
+    "                raise KeyError(f\"{product} is not in the inventory.\")\n",
+    "        except KeyError as e:\n",
+    "            print(e)\n",
+    "    return inventory\n",
+    "\n",
+    "def calculate_order_statistics(customer_orders, products):\n",
+    "    try:\n",
+    "        total_products_ordered = len(customer_orders)\n",
+    "        if len(products) == 0:\n",
+    "            raise ValueError(\"Products list cannot be empty.\")\n",
+    "        unique_products = set(products)\n",
+    "        percentage = (total_products_ordered / len(unique_products)) * 100\n",
+    "        return total_products_ordered, percentage\n",
+    "    except ZeroDivisionError:\n",
+    "        print(\"No products available to calculate percentage.\")\n",
+    "        return 0, 0\n",
+    "    except ValueError as e:\n",
+    "        print(e)\n",
+    "        return 0, 0\n",
+    "\n",
+    "def print_order_statistics(order_statistics):\n",
+    "    try:\n",
+    "        total_products_ordered, percentage_ordered = order_statistics\n",
+    "        print(\"Order Statistics:\")\n",
+    "        print(f\"Total Products Ordered: {total_products_ordered}\")\n",
+    "        print(f\"Percentage of Products Ordered: {percentage_ordered}%\")\n",
+    "    except Exception as e:\n",
+    "        print(f\"An error occurred while printing order statistics: {e}\")\n",
+    "\n",
+    "def print_updated_inventory(inventory):\n",
+    "    try:\n",
+    "        print(\"Updated Inventory:\")\n",
+    "        for product, quantity in inventory.items():\n",
+    "            print(f\"{product}: {quantity}\")\n",
+    "    except Exception as e:\n",
+    "        print(f\"An error occurred while printing updated inventory: {e}\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "id": "0cea9bf3-ee43-4903-954c-efe00d4aeaa4",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Choose quantity of t-shirt:  5\n",
+      "Choose quantity of mug:  5\n",
+      "Choose quantity of hat:  5\n",
+      "Choose quantity of book:  5\n",
+      "Choose quantity of keychain:  5\n",
+      "Enter the name of a product that the customer wants to order:  mug\n",
+      "Do you want to add another product? (yes/no):  yes\n",
+      "Enter the name of a product that the customer wants to order:  hat\n",
+      "Do you want to add another product? (yes/no):  no\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Order Statistics:\n",
+      "Total Products Ordered: 2\n",
+      "Percentage of Products Ordered: 40.0%\n",
+      "Updated Inventory:\n",
+      "t-shirt: 5\n",
+      "mug: 4\n",
+      "hat: 4\n",
+      "book: 5\n",
+      "keychain: 5\n"
+     ]
+    }
+   ],
+   "source": [
+    "inventory = initialize_inventory(products)\n",
+    "customer_orders = get_customer_orders(products)\n",
+    "updated_inventory = update_inventory(customer_orders, inventory)\n",
+    "order_statistics = calculate_order_statistics(customer_orders, products)\n",
+    "print_order_statistics(order_statistics)\n",
+    "print_updated_inventory(updated_inventory)"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "15ccfe7f-1523-4128-b189-ce63f7b8950f",
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {
@@ -66,7 +196,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.12.7"
   }
  },
  "nbformat": 4,