When customers call into a bank's customer service phone line, they are asked to do a survey on service quality at the end of the call. Six out of ten customers agree to do the survey. Of those who agree, 58% actually respond to all the questions. a. Calculate the probability that a randomly chosen customer who calls the service phone line will actually complete the survey. b. Calculate the probability that a randomly chosen customer will not complete the survey. c. If three customers are selected at random, what is the probability that only two of them will complete the survey?