Question 2 - Queuing [6 points] At the local department store, customers arrive at the cashier at the average rate of eight per hour. The employee at the cashier takes an average of five minutes to check out each customer. Assume this is a simple Poisson arrival, exponentially distributed sertice time situation. (a) (2 points] What model will you use? What is your 1 =? And u=? (b) (1 point) As a casual observer, how many customers would you expect to see at the cashier? (c) (1 point) How long would a customer expect to spend at the cashier (total time)? (d) [1 point] What is the utilization of the employee? (e) [1 point] What is the probability that there are more than three customers at the cashier