Don't have to and mustn't These sentences are wrong! Correct them using don't/doesn't have to or mustn't 1)People have

1) People mustn\'t touch the paintings in an art gallery. 2) A teacher doesn\'t have to wear a uniform. 3) You don\'t have to put cheese in an omelette. 4) If you\'ve got a computer you don\'t have to write with a pen. 5) I mustn\'t be late for my job interview tomorrow. 6) You mustn\'t talk to other students when you\'re doing an exam. 7) An actor doesn\'t have to be good at maths and science