An interviewer is given a list of people she can inter- view. if the interviewer needs to interview 5 people, and if each person (independently) agrees to be interviewed with probability ~, what is the probability that her list of people will enable her to obtain her necessary number of interviews if the list consists of (a) 5 people and (b) 8 people? for part (b ), what is the probability that the inter- viewer will speak to exactly ( c) 6 people and ( d) 7 people on the list?