The new-accounts officer at the Huskie Savings Bank enrolls all new customers in checking accounts. During a three-week period in August encompassing the new school year at NIU, the bank opens a lot of new accounts for students. The bank estimates that the arrival rate during this period will be Poisson distributed with an average of four customers per hour. The service time is exponentially distributed with an average of 12 minutes per customer to set up the new accounts. The bank wants to determine the average number of customers waiting to be served and the average waiting time.

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