Rewrite the sentences using must,mustn039;t, need to,has to,don039;t have to2It isn039;t

Rewrite the sentences using must,mustn't, need to,has to,don't have to
2It isn't necessary for children to buy a ticket
Children..............................
3It's our duty to look after our health
We........................................
4It's necessary for Assel to do her exercises
Assel....................................
5It's against the rules to play football here
We........................................