When customers call into a bank’s customer service phone line, they are asked to complete 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?