Turn the given sentences into affirmative sentences (Преврати заданные предложения в утвердительные предложения). Don't use full stops, they are given. (Не используйте точки, они даны)

Example
Mike can't swim.

Answer
Mike can swim.

1. Ben mustn't play the piano.

[ ].

2. You mustn't do your homework every day.

[ ].

3. Can he play the guitar?

[ ].