Horton Williams Airport is a small municipal airport with two runways. One of these runways is devoted to planes taking off. During peak time periods, about 8.5 planes per hour radio to the tower that they want to take off. The tower handles these requests in the order in which they arrive. Once the tower has given the go-ahead, it takes a plane, on average, 5 minutes to position itself on the runway and take-off.
a. On average, how many planes will be waiting during peak time periods? How many will be in the system (i.e., waiting and on the runway)?
b. How long, on average, will a plane have to wait before it is allowed to take off?