Consider a Chick fil A Drive-Thru restaurant at a busy time of the day (like 12:00 pm or 5:00 pm). A Chick fi A employee takes customer orders and payment while cars are still waiting in the line. Customer picks up the order from the kitchen window. While ordering taking and payment takes about 1 min per customer, the kitchen on average takes 4.5 min to get an order ready. Suppose on a typical busy time, when a new customer arrives, there are typically 5 cars in the Drive-Thru line ahead either placing an order, waiting or just about to pick up their food from the kitchen window. What is the average flow time of a car just joining the Drive-Thru line