(a) - (c) please

Question 3 10 points). The Bijou Theater in Hermosa Beach, California, shows vintage movies. Customers arrive at the theater's ticket counter at the rate of 100 per hour. The ticket seller averages 30 seconds per customer, which includes placing validation stamps on customers' parking lot receipts and punching their frequent watcher cards. a. What is the average customer waiting time in the system? [2 points) b. Hiring an assistant reduces the ticket seller's average service time to 20 seconds. What would be the effect of introducing an assistant on customers' waiting time in the system? [3 points) c. Instead of hiring an assistant, if a second ticket window is opened with each ticket seller doing the exact same tasks, how would customers' waiting time in the system change (compared to parts a, and b.)? [5 points]