Jiffy Wash provides a single-server complete car-wash service.Customers provide an arrival rate of 5 cars per hour. The servicerate is 6 cars per hour. Assume that arrivals follow a Poissonprobability distribution and that service times follow anexponential probability distribution. a. What is the average number of cars in the system? b. What is the average time that a car waits for the car-wash tobegin? c. What is the average time a car spends in the system? d. What is the probability that an arrival has to wait forservice? . . .