Scenario E.1 SimQuick is being used to simulate the following bank process: Customer arrivals at the Entrance Door of the bank with an average time between arrivals of 2.5 minutes. The Line Buffer holds 6 customers. If a customer arrives and the buffer line is filled, the customer leaves. The Work Station Teller's processing time per customer is normally distributed, with a mean of 3.0 minutes and a standard deviation of 0.5 minutes. The Served Customer Buffer in the flow chart is used to count the number of customers processed during the period simulated. A 2-hour period was simulated. The SimQuick simulation is run, and the results are as follows:

Use the information in Scenario E.1. Approximately what percentage of total customers who arrived during the 2-hour period found the buffer full and were not able to enter?

a)13%

b)94%

c)87%

d)6%