The Bijou Theater in Hermosa Beach, California, shows vintage movies. Customers arrive at the theater line at the rate of 102 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. (Because of these added services, many customers don't get in until after the feature has started.) Use Exhibit_7.12. a. What is the average customer time in the system? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Average customer time minutes b. What would be the customer time in the system if a second ticket taker doing nothing but validations and card punching, is appointed thereby cutting the average service time to 20 seconds? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Customer time seconds c. What would be the customer time in the system if a second window was opened with each server doing all three tasks? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Customer time seconds