(Answered) : First Local Bank would like to improve customer service at its drive-in facility by reducing waiting and transaction times. On t

First Local Bank would like to improve customer service at its drive-in facility by reducing waiting and transaction times. On the basis of a pilot study, the bank’s process manager estimates the average rate of customer arrivals at 40 per hour. All arriving cars line up in a single file and are served at one of 4 windows on a first-come/first-served basis. Each teller currently requires an average of 5 minutes to complete a transaction. The bank is considering the possibility of leasing high-speed information-retrieval and communication equipment that would cost $30 per hour. The new equipment would, however, serve