At an airport, delta needs to check in two flights that leave at the same time. for each of the two flights, 160 passengers will arrive randomly over the next two hours. there are 3 employees assigned to each flight and each employee can a passenger on average in 2 minutes (due to online and kiosk check-ins – this used to be 10 minutes), with a standard deviation of 2 minutes. how much does the average waiting time decrease when these two flights are pooled such that all passengers can go to all six employees? (first solve for the wait time assuming two "unpooled" systems, each of which has an arrival rate of 80 per hour. then solve for the wait time assuming a pooled system, with m=6. then find the difference in wait time.)