diff --git a/lab-python-data-structure.ipynb b/lab-python-data-structure.ipynb
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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "7c97e3d6-36e4-4374-8b26-8a294efed761",
+   "metadata": {},
+   "source": [
+    "## Define product lists"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "d97ce447-fa8f-4d43-9bb6-9a3e39dfba22",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "id": "2b5122b4-d9fb-428d-abef-ce974b4de44f",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Enter inventory quantity for each product:\n"
+     ]
+    },
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "t-shirt:  1\n",
+      "mug:  1\n",
+      "hat:  1\n",
+      "book:  1\n",
+      "keychain:  1\n"
+     ]
+    }
+   ],
+   "source": [
+    "# Step 3: Ask user to input quantity for each product\n",
+    "print(\"Enter inventory quantity for each product:\")\n",
+    "for product in products:\n",
+    "    while True:\n",
+    "        try:\n",
+    "            qty = int(input(f\"{product}: \"))\n",
+    "            if qty < 0:\n",
+    "                print(\"Quantity cannot be negative. Try again.\")\n",
+    "                continue\n",
+    "            inventory[product] = qty\n",
+    "            break\n",
+    "        except ValueError:\n",
+    "            print(\"Please enter a valid number.\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "id": "34dc00f2-a657-4a8f-aec7-a34bf287b529",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Step 4: Create an empty set for customer orders\n",
+    "customer_orders = set()\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "id": "f175c366-f264-46a4-8ec7-f9eb1447fd44",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "\n",
+      "Enter 3 products for the customer order:\n"
+     ]
+    },
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Product 1:  1,3,4\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Invalid product. Choose from the available products.\n"
+     ]
+    },
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Product 1:  t-shirt, mug, book\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Invalid product. Choose from the available products.\n"
+     ]
+    },
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Product 1:  mug, hat, book\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Invalid product. Choose from the available products.\n"
+     ]
+    },
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Product 1:  mut:1, t-shirt:1, book:1\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Invalid product. Choose from the available products.\n"
+     ]
+    },
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Product 1:  mug:1\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Invalid product. Choose from the available products.\n"
+     ]
+    },
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Product 1:  hat:1\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Invalid product. Choose from the available products.\n"
+     ]
+    },
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Product 1:  hat\n",
+      "Product 2:  mug\n",
+      "Product 3:  book\n"
+     ]
+    }
+   ],
+   "source": [
+    "# Step 5: Ask user to input 3 products for the order\n",
+    "print(\"\\nEnter 3 products for the customer order:\")\n",
+    "while len(customer_orders) < 3:\n",
+    "    order = input(f\"Product {len(customer_orders)+1}: \").lower()\n",
+    "    if order not in products:\n",
+    "        print(\"Invalid product. Choose from the available products.\")\n",
+    "    elif order in customer_orders:\n",
+    "        print(\"You already added this product.\")\n",
+    "    else:\n",
+    "        customer_orders.add(order)\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "id": "4eb2c792-3604-47b5-bd17-524e4c6b8853",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "\n",
+      "Customer Orders:\n",
+      "hat\n",
+      "mug\n",
+      "book\n"
+     ]
+    }
+   ],
+   "source": [
+    "# Step 6: Print the products in the customer_orders set\n",
+    "print(\"\\nCustomer Orders:\")\n",
+    "for item in customer_orders:\n",
+    "    print(item)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "id": "8d9739c5-33b7-4ff8-88d9-6ef61be5c44b",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Step 7: Calculate order statistics\n",
+    "total_products_ordered = len(customer_orders)\n",
+    "percentage_ordered = (total_products_ordered / len(products)) * 100\n",
+    "order_status = (total_products_ordered, percentage_ordered)\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 10,
+   "id": "571a9dd7-c327-4398-9502-638363b2dc3d",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "\n",
+      "Order Statistics:\n",
+      "Total Products Ordered: 3\n",
+      "Percentage of Products Ordered: 60.00%\n"
+     ]
+    }
+   ],
+   "source": [
+    "# Step 8: Print order statistics\n",
+    "print(\"\\nOrder Statistics:\")\n",
+    "print(f\"Total Products Ordered: {order_status[0]}\")\n",
+    "print(f\"Percentage of Products Ordered: {order_status[1]:.2f}%\")\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 11,
+   "id": "8d6eba54-4f3a-4766-af29-426b337a0ea5",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Step 9: Update the inventory (subtract 1 for each ordered product)\n",
+    "for item in customer_orders:\n",
+    "    if inventory[item] > 0:\n",
+    "        inventory[item] -= 1\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "id": "c4d7bb77-3762-4d82-9ffd-da79ff2f37b2",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "\n",
+      "Updated Inventory:\n",
+      "t-shirt: 1\n",
+      "mug: 0\n",
+      "hat: 0\n",
+      "book: 0\n",
+      "keychain: 1\n"
+     ]
+    }
+   ],
+   "source": [
+    "\n",
+    "# Step 10: Print updated inventory\n",
+    "print(\"\\nUpdated Inventory:\")\n",
+    "for product, qty in inventory.items():\n",
+    "    print(f\"{product}: {qty}\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "5e8de26c-e1c2-4c17-a6b1-8c4cd534a01e",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.11.7"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}