PA 3-10 (Algo) An automated car wash serves customers... An automated car wash serves customers with the following serial process: pretreat, wash, rinse, wax, hand dry. Each of these steps is performed by a dedicated machine except for the hand-dry step, which is performed manually on each car by one of three workers. The steps of the process have the following processing times: - Pretreat: 3 minute per car - Wash: 7 minutes per car - Rinse: 2 minutes per car - Wax: 5 minutes per car - Hand dry: 3 minutes per car a. If the car wash has a demand of 18 cars per hour, what is the flow rate of the process? Note: Round your answer to 2 decimal places. b. If the car wash has a demand of 18 cars per hour, what is the utilization of the machine that performs the Wax process? Note: Round your answer to 2 decimal places