Hi! I need help with this question in operations management class. I need help with part iii, iv, v. I give excellent ratings. Thank you !

2. You are the manager of a grocery store Trader M's in downtown Berkeley. Because of COVID- 19, you limit the number of customers who can be in a store at the same time, in order to facilitate social distancing. This limit is m customers. The store has two entrances - one from the parking garage (entrance A) and the other from the street front (entrance B). The exits are through the same doors as the entraces. Customers who finish shopping exit from either of these two entrances. To manage the limit of customers, two queues are marked at the two entrances. You appoint two associates to count and direct customers in each entrance. Once the store hits the capacity limit m, customers will be admitted into the store following the policy one-out-one-in. For example, one customer lined up at the garage entrance will be admitted if one customer exits from the store to the garage. a.) The current time is marked as t = 0. Suppose that customers arrive at the garage entrance according to a Poisson process N = (Ni(t): t > 0) with rate 40 customers per hour and the customers arrival process to the street front entrance is a Poisson process N2 = (N2(t): t > 0) with rate 20 customers per hour. Given the nature of the business, these two arrival streams are independent. iii.) The associate begins to count customers arriving at the garage entrance from time 0. What is the expected time that the 10-th customer arrives at the garage entrance? iv.) What is the expected time when the 10-th customer arrives at the store? v.) What is the expected time when both entrances see customers arriving