Suppose we are analyzing a traditional two-step process for a drive-through window. The process is as follows: a customer arrives and waits in a single order queue, then goes directly to a single window queue, before exiting the system. In reality this process can be more complicated, e.g. the McDonald's example from class or Chick-fil-A (which uses queuing theory to a great deal), but we will keep it simple for the exam. The manager has provided us with an arrival rate of X = 2 customers per minute and the following metrics: Order queue Window queue Utilization factor p=0.9 p=0.8 Mean time in queue E[W.] = 4.05 minutes E[W.] = 1.6 minutes Service time ET) = 0.45 minutes E (T) = 0.4 minutes = What is the average number of customers in line, E(L), at the order queue? How about the average number in line at the window queue? O a. 2.25 in the order queue, and 3.2 in the window queue O b. 3.2 in the order queue, and 2.25 in the window queue O c. 8.1 in the order queue, and 3.2 in the window queue