Hello, I was asked the below in my tech screen for Thumbtack. I failed and would very much like to know how to solve it.\n\n```\n# Add a task: each has a description, a due time and an associated callback URL\n# Manually mark a task as done\n# Get a list of all the pending tasks\n# When a task\u2019s due time is reached, the callback URL should be called, (without waiting for a response), and the task marked as done\n```

Hello, I was asked the below in my tech screen for Thumbtack. I failed and would very much like to know how to solve it.\n\n\n# Add a task: each has a descripti