A university found that 20% of its students withdraw without completing the introductory statistics course. Assume that 20 students registered for the course.

(a)Compute the probability that 2 or fewer will withdraw. If required, round your answer to four decimal places.(b)Compute the probability that exactly 4 will withdraw. If required, round your answer to four decimal places.(c)Compute the probability that more than 3 will withdraw. If required, round your answer to four decimal places.(d)Compute the expected number of withdrawals.