A priority waiting system assigns arriving customers to one of four classes. Arrival rates (Poisson) of the classes are shown in the following table: Class Arrivals per Hour 1 2 2 3 4 Click here for the Excel Data File Five servers process the customers, and each can handle 4 customers per hour. a. What is the system utilization? (Round your answer to 3 decimal places.) b. What is the average wait for service by customers in the various classes? How many are waiting in each class, on average? (Round your answers to 3 decimal places.) W W W3 W L L2 L3 L4