Question 5: Predictable Variability 4 points The demand on a hospital's emergency medical services is considered predictable. Please answer 'True' or 'False'. cally stored answer: Question 6: Trade-Off Service-Capacity vs Waiting 4 points A central problem in virtually every waiting line situation is a trade-off decision balancing the costs of adding services with the costs of waiting. Please answer 'True' or 'False'. Locally stored answer: Question 7: Waiting Line Performance 6 points The average number in the waiting line divided by the average arrival rate yields what measure of waiting line performance? Please explain in one short sentence. Locally stored