Collections Checkpoint

1. Explain list mutability.
2. Convert a list to unique values.
3. Count word frequency.
4. Find the second-largest distinct number.
5. Unpack a tuple.
6. Explain when to use a set.
7. Build a shopping cart dictionary.
8. Normalize a sentence.
9. Predict the result of slicing examples.
10. Complete one collection mini-project.