What do the people below have to or don't have to/needn't do when going on holiday.

1. I have to pack my suitcase.
2. Peter needs to study for school.
3. Bob and Sally need to turn all the lights off when the baby is sleeping in the room.
4. We need to wake up early.
5. They need to close the windows.
6. My brother and I need to water the plants in our summer cottage.
7. Sue needs to empty the fridge because she is leaving tomorrow.