Big Al's Car Wash has two wash bays. Each bay can wash 15 cars per hour. Cars arrive at the carwash at the rate of 15 cars per hour on the average, join the waiting line, and move to the next open bay when it becomes available. Use the Multiple Server Queue Excel template to answer the following questions:

a. What is the average time waiting for a bay?

b. What is the probability that a customer will have to wait?

c. As a customer of Big Al's, do you think the system favors the customer? If you were Al, what would be your attitude toward this service level?