In a queueing system, customers arrive once every 4 seconds (standard deviation = 6) and services take 3 seconds (standard deviation = 6). (Do not round intermediate calculations. Round your answer to three decimal places.) What is the average number of customers in the queue? 12.750 customers At the stadium, there are six lines for arriving customers, each staffed by a single worker. If the arrival rate for customers is 170 per minute and each customer takes (on average) 1.9 seconds for a worker to process. (Round your answer to three decimal places.) What is the worker utilization? 0.897 The organizers of a conference in the Houston Convention Center are evaluating the possibility of setting up a computer area where attendees can check their e-mail on computers provided by the organization. There will be one common queue for all computers and only one person uses a computer at a time. On average, there are 18 attendee arrivals per hour and the average time a person spends on the computer is 13 minutes. To ensure that waiting times are not too long, the organizers want to ensure that the utilization of the computers doesn't exceed 80 percent. At least how many computers do they need to have? computers