Challenge 1: Insert Three Documents at Once — Possible Solution
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db.tasks.insertMany([
  { title: "Write chapter draft", done: false },
  { title: "Review pull request", done: true },
  { title: "Update documentation", done: false }
])

WHY THIS WORKS AS AN ANSWER
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insertMany takes an ARRAY of document objects — each element between
the square brackets is one complete document, following the same
{ field: value, ... } shape a single insertOne document would use.
All three documents share the same two fields (title and done) here,
but that's a design choice for this challenge, not a MongoDB
requirement — per Chapter 1, documents in the same collection are
never required to share an identical shape, even when inserted
together in the same insertMany call.