Don39;t have to and mustn39;t These sentences are wrong! Correct them

Don39;t have to and mustn39;t These sentences are wrong! Correct them using don39;t/doesn39;t have to or mustn39;t 1)People have to touch the paintings in an art gallery 2) A teacher has to wear a uniform 3)You have to put cheese in an omelette. 4)If you39;ve got a computer you have to write with a pen 5) I have to be late for my job interview tomorrow 6) You have to talk to other students when you39;re doing an exam 7)An actor has to be good at maths and science