ABC Bank is considering a drive through windows for customer service. Management estimates that customers will arrive at the rate of 15 per hour. The teller who will staff the window can serve…

ABC Bank is considering a drive through windows for customer service. Management estimates that customers will arrive at the rate of 15 per hour. The teller who will staff the window can serve customer at the rate of one every three minutes. Assuming the poisson arrival and exponential service, find: a. Utilization of the Teller. b. Average number of customers in the waiting Line. c. Average waiting time in Line.