Automobiles arrive at the drive-through window at the downtown baton rouge, louisiana, post office at the rate of 4 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 distributed. a) the average time a car is in the system = nothing minutes (round your response to two decimal places). b) the average number of cars in the system = nothing cars (round your response to two decimal places). c) the average number of cars waiting to receive service = nothing cars (round your response to two decimal places). d) the average time a car is in the queue = nothing minutes (round your response to two decimal places). e) the probability that there are no cars at the window = nothing (round your response to two decimal places). f) the percentage of the time the postal clerk is busy = nothing% (round your response to the nearest whole number). g) the probability that there are exactly 2 cars in the system = nothing (round your response to three decimal places). h) if a second drive-through window, with its own server, were added, the average time a car is in the system = nothing minutes (round your response to two decimal places).