Assignment task: United Raiders Drive-In Market has one checkout counter where one employee operates the cash register. The combination of the cash register and the operator is the server in this queuing system; the customers who line up at the counter to pay their selections from the waiting line. Customers arrive at a rate of 6 per hour according to a Poisson distribution, and service times are on average equal to 8 minutes per customer. What is the average waiting time in the queue in minutes?