Waiting time, banks. Regal Bank has a small branch in Orillia, Ontario. The counter is staffed by one teller. The counter is open for five hours (300 minutes) each day (the operational capac¬

ity). It takes six minutes to serve a customer (service time). The Orillia branch expects to receive 42 customers each day. (Note that the number of customers corresponds to the number of orders in the chapter discussion.)

Required 1. Using the formula on page 752, calculate how long, on average, a customer will wait in line before being served.

2. How long, on average, will a customer wait in line ifthe branch expects 50 customers each day and the average time to serve each is 5 minutes?

3. The bank is considering ways to reduce waiting time. How long will customers have to wait, on average, if the time to serve a customer is reduced to 4.5 minutes and the bank expects to serve 50 customers each day?