Q. Sharp discounts wholesale club has 2 service desks, one at each entrance of the store. Customers arrive at each service desk at an average of one every six min. . The service rate at each service desk is four min. per customer.

A. Explain how often (illustrate what percentage of time) is each service desk idle?

B. Illustrate what is the probability that both service clerks are busy?

C. Illustrate what is the probability that both service clerks are idle?

D. Explain how many customers, on average, are waiting in line in front of each service desk?

E. Explain how much time does a customer spend at the service desk (waiting plus service time)?