At sally's hair salon there are three hair stylists. 28% of the hair cuts are done by chris, 30% are done by karine, and 42% are done by amy. chris finds that when he does hair cuts, 4% of the customers are not satisfied. karine finds that when she does hair cuts, 5% of the customers are not satisfied. amy finds that when she does hair cuts, 5% of the customers are not satisfied. suppose that a customer leaving the salon is selected at random. if the customer is not satisfied, what is the probability that their hair was done by amy?