Question No.5: [LO5] [2 Ma

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Question
No.5:
[LO5] [2 Marks]
The computer lab at State University has a help desk to assist
students working on computer spreadsheet assignments. The students
patiently form a single line in front of the desk to wait for help.
Students are served based on a first-come, first-served priority
rule. On average, 15 students per hour arrive at the
help desk. Student arrivals are best described using a Poisson
distribution. The help desk server can help an average of
20 students per hour, with
the service rate being described by an exponential distribution.
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