Transform the following sentences replacing modal verb may / might with the appropriate form of its equivalents to be allowed to / to be permitted to.
1. Emma is not well today, so she may leave work early.
2. In the Zoo visitors may not feed the animals.
5. You may not smoke in the office.
6. May I change my holiday from April to July?
12. In the early days of motoring, before 1878, cars might not go faster tha 4 miles an hour.