Question 2. In a banking facility, on an average 96 customers per 24-hour day require the express service of a bank teller. Also on an average, a customer requires 10 minutes of active attention. Assume that the facility can handle only one express service at a time. Suppose that it costs the bank $1000 per customer served to obtain an average servicing time of 10 minutes, and that each minute of decrease in this average time would cost $100 per customer served. How much would have to be budgeted by the bank to decrease the average size of the queue from one and a third customers to half customer? (10 marks)