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a) The data below shows the arrival time , service time , and delays for 6 customers arriving at a Barbershop, which has one Barber, and service is offered on a first-come first-served basis.
i
1
2
3
4
5
6
Ai
15
47
71
111
123
152
Di
0
11
23
17
35
44
Si
43
36
34
30
38
40
i. Calculate the average inter-arrival time and the arrival rate ii. Calculate the average service time and the service rate
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