diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb
index f4c6ef6..7d0aedc 100644
--- a/lab-python-error-handling.ipynb
+++ b/lab-python-error-handling.ipynb
@@ -72,11 +72,138 @@
     "\n",
     "4. Test your code by running the program and deliberately entering invalid quantities and product names. Make sure the error handling mechanism works as expected.\n"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "e88770df",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def calculate_total_price(customer_orders):\n",
+    "    total_price = 0\n",
+    "    for product in customer_orders:\n",
+    "        valid_price = False\n",
+    "        while not valid_price:\n",
+    "            try:\n",
+    "                price = float(input(f\"Enter the price of {product}: \"))\n",
+    "                if price < 0:\n",
+    "                    raise ValueError(\"Invalid price! Please enter a non-negative value.\")\n",
+    "                valid_price = True\n",
+    "            except ValueError as error:\n",
+    "                print(f\"Error: {error}\")\n",
+    "        total_price += price\n",
+    "    return total_price"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c3981370",
+   "metadata": {},
+   "source": [
+    "Modify the `get_customer_orders` function to include error handling.\n",
+    "   - If the user enters an invalid number of orders (e.g., a negative value or a non-numeric value), display an error message and ask them to re-enter the number of orders.\n",
+    "   - If the user enters an invalid product name (e.g., a product name that is not in the inventory), or that doesn't have stock available, display an error message and ask them to re-enter the product name. *Hint: you will need to pass inventory as a parameter*\n",
+    "   - Use a try-except block to handle the error and continue prompting the user until a valid product name is entered."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "092deebc",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def get_customer_orders(inventory):\n",
+    "    valid_number = False\n",
+    "    while not valid_number:\n",
+    "        try :\n",
+    "            num_orders = int(input(\"Enter the number of customer orders: \"))\n",
+    "            if num_orders < 0:\n",
+    "                     raise ValueError(\"inavalid price!please enter a non-negative value.\")\n",
+    "            valid_number = True\n",
+    "        except ValueError as error:\n",
+    "            print(f\"error : {error}\")\n",
+    "\n",
+    "    customer_orders = set()\n",
+    "    for i in range(num_orders):\n",
+    "        valid_product = False\n",
+    "        while not valid_product:\n",
+    "              product = input(\"Enter the name of a product that a customer wants to order: \")\n",
+    "              if product not in inventory:\n",
+    "                   print(f\"Error: '{product}' is out of stock. Please choose a different product.\")\n",
+    "              else:\n",
+    "                customer_orders.add(product)\n",
+    "    return customer_orders"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "id": "1e54577e",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def get_customer_orders(inventory):\n",
+    "    valid_number = False\n",
+    "    while not valid_number:\n",
+    "        try:\n",
+    "            num_orders = int(input(\"Enter the number of customer orders: \"))\n",
+    "            if num_orders < 0:\n",
+    "                raise ValueError(\"Invalid number of orders! Please enter a non-negative value.\")\n",
+    "            valid_number = True\n",
+    "        except ValueError as error:\n",
+    "            print(f\"Error: {error}\")\n",
+    "\n",
+    "    customer_orders = set()\n",
+    "    for i in range(num_orders):\n",
+    "        valid_product = False\n",
+    "        while not valid_product:\n",
+    "            product = input(\"Enter the name of a product that a customer wants to order: \")\n",
+    "            if product not in inventory:\n",
+    "                print(f\"Error: '{product}' is not a valid product in the inventory. Please enter a valid product name.\")\n",
+    "            elif inventory[product] == 0:\n",
+    "                print(f\"Error: '{product}' is out of stock. Please choose a different product.\")\n",
+    "            else:\n",
+    "                customer_orders.add(product)\n",
+    "                valid_product = True\n",
+    "\n",
+    "    return customer_orders"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "id": "cbc8e13e",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "inventory = {\"apple\": 5, \"banana\": 0, \"orange\": 3}"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "id": "ddf9434d",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{'apple'}\n"
+     ]
+    }
+   ],
+   "source": [
+    "orders = get_customer_orders(inventory)\n",
+    "print(orders)"
+   ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "base",
    "language": "python",
    "name": "python3"
   },
@@ -90,7 +217,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.9"
   }
  },
  "nbformat": 4,