diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb
index 3e50ef8..15966a0 100644
--- a/lab-python-error-handling.ipynb
+++ b/lab-python-error-handling.ipynb
@@ -41,18 +41,123 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 3,
    "id": "cc2c441d-9dcf-4817-b097-cf6cbe440846",
    "metadata": {},
    "outputs": [],
    "source": [
-    "# your code goes here"
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "\n",
+    "    for product in products:\n",
+    "        while True:\n",
+    "            try:    \n",
+    "                quantity = int(input(f\"Enter the initial quantity for {product}: \"))\n",
+    "\n",
+    "                if quantity < 0:\n",
+    "                    raise ValueError(\"Quantity cannot be negative. Please enter a valid number.\")\n",
+    "             \n",
+    "            except ValueError as e:\n",
+    "                print(e)\n",
+    "\n",
+    "            else:\n",
+    "                 inventory[product] = quantity\n",
+    "                 break \n",
+    "    return inventory\n",
+    "\n",
+    "\n",
+    "def get_customer_orders(products):\n",
+    "    customer_orders = set()\n",
+    "\n",
+    "    while True:\n",
+    "        try:\n",
+    "            order = input(\"Enter the name of a product the customer wants: \").lower().strip()\n",
+    "\n",
+    "            if order == \"\":\n",
+    "                raise ValueError(\"Product name cannot be empty. Please enter a valid product name.\")\n",
+    "\n",
+    "            if order in products:\n",
+    "                customer_orders.add(order)\n",
+    "\n",
+    "            else:\n",
+    "                print(\"That product does not exist in the store.\")\n",
+    "                continue\n",
+    "\n",
+    "        except ValueError as e:\n",
+    "            print(e)\n",
+    "            continue\n",
+    "\n",
+    "        while True:\n",
+    "            another = input(\"Does the customer want to order another product? (yes/no): \").lower().strip()\n",
+    "            if another in [\"yes\", \"no\"]:\n",
+    "                break\n",
+    "            print(\"Please enter 'yes' or 'no'.\")\n",
+    "\n",
+    "        if another == \"no\":\n",
+    "            break   \n",
+    "           \n",
+    "\n",
+    "    return customer_orders\n",
+    "\n",
+    "def update_inventory(customer_orders, inventory):\n",
+    "\n",
+    "    for product in customer_orders:\n",
+    "        try:\n",
+    "            if inventory[product] > 0:\n",
+    "                inventory[product] -= 1\n",
+    "            else:\n",
+    "                print(f\"Sorry, {product} is out of stock\")\n",
+    "        except KeyError:\n",
+    "            print(f\"Sorry, {product} is not in the inventory.\")\n",
+    "       \n",
+    "                \n",
+    "def calculate_order_statistics(customer_orders, products):\n",
+    "    try:\n",
+    "        total_customer_orders = len(customer_orders)\n",
+    "        total_products = len(products)\n",
+    "        percentage_order = (total_customer_orders / total_products) * 100\n",
+    "\n",
+    "    except ZeroDivisionError:\n",
+    "        print(\"No products available in the store to calculate statistics.\")\n",
+    "        return 0, 0\n",
+    "\n",
+    "    else:\n",
+    "        return total_customer_orders, percentage_order      \n",
+    "\n",
+    "def print_order_statistics(order_statistics):\n",
+    "    try:\n",
+    "        total = order_statistics[0]\n",
+    "        percentage = order_statistics[1]\n",
+    "\n",
+    "        print(\"total orders:\", total)\n",
+    "        print(\"percentage:\", percentage)\n",
+    "\n",
+    "    except IndexError:\n",
+    "        print(\"Index out of range for order statistics.\")\n",
+    "\n",
+    "    except TypeError:\n",
+    "        print(\"Invalid data type for order statistics.\")\n",
+    "\n",
+    "    else:\n",
+    "        print(\"Order statistics printed successfully.\")\n",
+    "\n",
+    "def print_updated_inventory(inventory):\n",
+    "    try:\n",
+    "        print(\"Inventory:\")\n",
+    "        for product in inventory:\n",
+    "            print(product, inventory[product])\n",
+    "\n",
+    "    except Exception as e:\n",
+    "        print(\"Error while printing inventory:\")\n",
+    "        print(e)\n",
+    "    \n",
+    "  "
    ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "base",
    "language": "python",
    "name": "python3"
   },
@@ -66,7 +171,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.9"
   }
  },
  "nbformat": 4,