Rewrite the parts of sentences in italics with 'must not' or 'don't have to'.
1. You are not obliged to work on Sundays.
2. It's forbidden to smoke in here.
3. You're not allowed to wait here.
4. It's unnecessary for you to wait here.
5. It's forbidden to walk on the lawn.
6. It's unnecessary for them to work on Sunday.

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