Please submit both your questionnaire and your answer sheet. 1. (2 points) The organizers of a conference in the Philadelphia 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 15 attendee arrivals per hour, the standard deviation of the time between arrivals is 4, and the average time a person spends on the computer is 10 minutes (with standard deviation 3). To ensure that waiting times are not too long, the organizers what to ensure that the utilization of the computers doesn't exceed 90%. At least how many computers do they need to have