a) If the average time between customer arrivals is 8 minutes, what is the hourly arrival rate? b) How much time, on average, would a server need to spend on a customer to achieve a service rate of 20 customers per hour? c) Take an imaginary trip to the airport, identify at least 2 poka-yoke opportunities. Customers arrive at a DMV facility at an average of one every 15 minutes, and their requests take on average 10 minutes to be processed. The service counter is staffed by only one clerk, Sleepy Joe, who works eight hours per day. Assume Poisson arrivals and exponential service times. (use Model 1 formulas) d) What percent of time is Sleepy Joe idle? e) How much time, on average, does a customer spend waiting in line? f) How long is the (waiting) line on average