Question: The lab at YU has a help desk to support students working on computer assignments. Students are served based on a first-come, first-served priority rule.

The lab at YU has a help desk to support students working on computer assignments. Students are served based on a first-come, first-served priority rule. On average, 15 students per hour arrive(Poisson distribution) at the help desk. The help desk server (exponential distribution) can help an average of 20 students per hour. Calculate the following operating characteristics of the service system. (a) The average utilization of the help desk server (b) The average number of students in the system (c) The average number of students waiting in line (d) The average time a student spends in the system (e) The average time a student spends waiting in line

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