Consider the drive-through window at the Starbucks It may be reasonably modeled as a first-come first-serve, single-server queuing system with random arrivals at the rate of 12 customers per hour and service times following a Weibull distribution with a mean service time of 4 minutes and a standard deviation of 3 minutes. Assume that both the system capacity and calling source are infinite. To the nearest first decimal place, what is the expected total number of cars either being served or waiting to be served in steady state? None of the other choices O 3.3 cars O 2.0 cars 1.8 cars