Note: This question requires the use of the Queueing Simulator spreadsheet in Excel. Use the queueing simulator to simulate a queueing system with $2$ servers, exponential interarrival times with a mean of $20$ seconds and constant service times of $35$ seconds. Use a simulation run length of $10,000$ arrivals. What is the point estimate for the average number of customers in the system?

Multiple Choice

$9$ customers

$4$ customers

$10$ customers

$8$ customers