Question No.2: The computer lab at BUC has a help desk to help the students working on computer spreadsheet assignments. The students patiently from 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 21 students per hour, with the service rate being described by an Exponential distribution. Calculate the following operating characteristics of the service system.

1. Rate of arrivals

2. Rate of service

3. The average utilization of the help desk server

4. The average number of students in the system

5. The average number of students waiting in queue

6. The average time a student spends waiting in line

7. The average time a student spends in the system

8. The probability of having more than 4 students in the system

Question No.2

Solve the following assignment Problem by complete enumeration method.

jobs /work	1	2	3
A	110	90	70
B	50	60	80
C	100	130	110