20 The California border inspection station (see Problem 19) is considering the addition of a sec- ond inspector. The vehicles would wait in one lane and then be directed to the first available inspector. Arrival rates would remain the same (10 per minute) and the new inspector would process vehicles at the same rate as the first inspector (12 per minute). a What would be the average length of the waiting line?

b. What would be the average time that a vehicle must wait to get through the system? If a second lane was added (one lane for each inspector):

c. What would be the average length of the waiting line?

d. What would be the average time that a vehicle must wait to get through the system?