Question 1: Find the average time in the line if 2, 3, and 4 clerks are used.
Question 2: What is the total time spent waiting in line each day if 2, 3, and 4 clerks are used?
Question 3: Calculate the total of the daily waiting cost and the service cost if 2, 3, and 4 clerks are used. What is the minimum total daily cost?