PLEASE explain in detail. Also please explain or show the calculation for the CVa (the coefficient of variation of arrival times) and CVp (the coefficient of variation of processing times). THANK YOU!

fast-food franchise is considering offering a drive-through service. Arriving customers will place orders at an tercom station at the back of the parking lot and then drive up to the service window to pay for and receive heir order. Customer arrivals are expected to have an average arrival rate of 24 cars per hour, with customer ater-arrival times having a standard deviation of 2.5 minutes. our different service alternatives are being considered, and the goal of the exercise is to assist the franchise ith choosing among them. We will focus on service quality (not cost). (a) [One window - _one employee] The first mode of operation involves one employee who both fills the order and takes payment from the customer. The average service time for this alternative is 2 minutes with a standard deviation of 2 minutes. What will be the average waiting time for consumers under this mode of operation? What will be the average length of the queue? [Hint: To get the length of the queue, apply Little's law to the queue. What is the flow rate of the queue? What is the flow time of the queue (average time a customer spends there)?] (b) [One window -_two employees] The second mode of operation involves two employees who work as a team (not in parallel) to serve each customer. One fills the order and one handles the payment. The average service time for this alternative is 1.25 minutes, with a standard deviation of 1.25 minutes. What will be the average waiting time for consumers under this mode of operation? What will be the average length of the queue