1. A small convenience store normally has one employee attending to the cash register. The average time between customer

1. A small convenience store normally has one employee attending to the cash register. The average time between customer arrivals at the store is 3 minutes. The average service time at the cash register is 2 minutes. Management wants to estimate the average time spent by customers from the time that they walk up to the cash register until the time that they are finished with the cashier. Using a queuing model, you can estimate this time to be ________

2. A small commuter airline operates a 6-passenger airplane. The airline management has applied an overbooking analysis to determine how many reservations they should take for their morning flight. The result of the analysis is shown on the table below. How many seats should they overbook?

3. A small convenience store normally has one employee attending to the cash register. The average customer arrival rate is 90 customers per hour. The cashier, when fully busy, can serve 50 customers per hour. If the store could provide two cashiers at the counter with two cash registers, the average wait time for customers before they can start being served by a cashier is expected to be ______