Which of the following corrects the mistake in the example below? There is nobody else using the gym, so you mustn’t be quiet.

There is nobody else using the gym, so you don’t have to be quiet.

There is nobody else using the gym, so you didn’t have to be quiet.

There is nobody else using the gym, so you had to be quiet.

There is nobody else using the gym, so you have to be quiet.

There is nobody else using the gym, so you must be quiet.