The average amount of time that a customer waits in line for service is given by W(x, y) = y < x where y is the average arrival rate and x is the average service rate (x and y are measured in the number of customers per hour). Evaluate W at each point. (a) (10, 6) X min (b) (10, 8) min (c) (12, 2) min (d) (13, 7) min

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