During the two hours of the morning rush from 8 a.m. to 10 a.m., 100 customers per hour arrive at the coffee shop. The coffee shop has a capacity of 80 customers per hour.
a. How long does the customer arriving at 10 a.m. have to wait to be served?
b. On average, how long does a customer arriving during the morning rush wait to be served?
Let’s answer both of