Assume the average time between students walking up to the instructor's desk during an exam to ask a question is 8 minutes and follows the exponential probability distribution. a) What is the probability that the next student will ask a question within the next 3 minutes? b) What is the probability that the next student will ask a question within the next 6 minutes? c) What is the probability that the next student will ask a question between 4 and 8 minutes? d) What is the probability that the next student will ask a question in more than 18 minutes? a) The probability that the next student will ask a question within the next 3 minutes is. (Round to four decimal places as needed.) b) The probability that the next student will ask a question within the next 6 minutes is (Round to four decimal places as needed.) c) The probability that the next student will ask a question between 4 and 8 minutes is (Round to four decimal places as needed.) d) The probability that the next student will ask a question in more than 18 minutes is. (Round to four decimal places as needed.)