Burger Queen is a restaurant that sells hamburgers close to the University. The restaurant can provide the service to a total of 48 customers per hour. Customers arrive to the restaurant from 6pm to 9pm. From 6 pm to 8 pm, 60 customers per hour arrive to the restaurant. From 8pm to 9 pm, 40 arrive to the restaurant. After 9pm, customers stop coming. But the restaurant will continue its operations until after the last customer in the line has been served. Hint: Estimate the buildup rates for the different time intervals and draw the buildup diagram.

1.) What is the capacity of the process?

2.) Consider the time from 6pm to 8pm: Given that in this time interval the demand rate is greater that capacity rate, the restaurant will have an accumulation of customers waiting in line. At what rate is the number of customers in line increasing?

3.) Consider the time after 9pm: Given that customers stop coming at 9pm, the restaurant will be able to reduce the number of customers waiting in line.

4.) At what rate is the number of customers in line decreasing? What is the maximum number of customers waiting in the line?

5.) At what does the last customers waiting in the line stop waiting?