What would be the customer time in the system if instead of the change in part $($b$),$ a second window was opened with each server doing all three tasks? The Bijou Theater shows vintage movies. Customers arrive at the theater line at the rate of $100$ per hour. The ticket seller averages $24$ 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.$)$