Steven's Retail Outlet has 2 cashiers. Its customers arrive according to the Poisson distribution and the service times are based on negative exponential distribution. James, the Store Manager has calculated that the customer service times average approximately 3 minutes and that the time between arrivals of customers is, on average, 2 minutes. Making the assumption that customers are equally divided between the 2 cashiers:

What is the average number of customers (1) waiting in each line and (2) being checked out? For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).