Exercise 7-31 (Algo) (LO7-4) Waiting times to receive food after placing an order at the local Subway sandwich shop follow an exponential distribution with a mean of 72 seconds. Calculate the probability a customer waits: a. Less than 28 seconds. (Round your answer to 4 decimal places.) b. More than 136 seconds' (Round your answer to 4 decimal places.) c. Between 35 and 82 seconds. (Round your answer to 4 decimal places.) d. Fifty percent of the patrons wait less than how many seconds? What is the median? (Round your answer to 2 decimal places.) ' seconds