ADB Bank is considering opening a drive-through window for customer service. Management Estimates that customers will arrive at the rate of 15 per hour. The teller who will staff the window can service the customers at the rate of one every three minutes. The manager of the bank wants to know how well the teller will be utilized, the average number of customers waiting in line and in the system and the average waiting time of a customer in line and in the system. Help the manager with appropriate calculations