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    "# Ch13 Lab\n",
    "\n",
    "Build a small task-management simulation.\n",
    "\n",
    "Requirements:\n",
    "\n",
    "- Use a queue for incoming tasks.\n",
    "- Use a stack for undo history.\n",
    "- Use a dictionary to store task metadata by task ID.\n",
    "- Demonstrate adding three tasks, completing two tasks, undoing one action, and looking up one task by ID.\n",
    "- Include short comments explaining why each structure was chosen."
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