Automobiles arrive at the drive-through window at the downtown Baton Rouge, Louisiana, post office at the rate of 3 every 10 minutes. The average service time is 1.5 minutes. The Poisson distribution is appropriate for the arrival rate and service times are negative exponentially distributod. a) The average time a car is in the system =2.72 minutes (round your response to two decimal places) b) The average number of cars in the system = cars (round your response to two decimal places). c) The average number of cars waiting to receive service = cars (round your response to two decimal places)