Business Decision Analytics under Undertainty (33:136:400) 
Professor Eckstein
Simulation Variable Arrival Rates and Staffing Levels

You manage a store that operates 24 hours per day.  Customers arrive at the checkout line as follows:

A single line is shared between all cashiers.  The time required for customer checkout is well modeled by a triangular distribution with a minimum value of 1 minute, a most likely value of 5 minutes, and a maximum value of 8 minutes.  You currently staff cashiers in 4-hour time blocks, as follows

Simulate 50 days of operation.  What is the average time waiting in line for a cashier?