McDonalds is planning on putting in a kiosk for customers to order a meal rather than waiting for the line to shorten. It is estimated the usage rate will average 6 per hour and the requests will follow a Poisson probability distribution. Service time is exponentially distributed and is estimated to have a mean service time of 3 minutes per order. Determine: a. System utilization b. Average time customers will spend in the system c. Probability of “0” customers in the system.