12. What is the flow time in the below process (in seconds)?

		None of the choices
		3.75
		3.25
		4.75
		8.25
		8

13. JSOM is organizing a conference. The organizers are evaluating the possibility of setting up a computer area where attendees can check their email on 4 computers provided by JSOM. On average, there are 24 attendee arrivals per hour, the standard deviation of the time between arrivals is 7 minutes, and the average time a person spends on the computer is 8 minutes (with standard deviation of 95 seconds). The organizers were wondering whether to have four queues (a queue for each computer), or a single queue. With four queues, the average arrival rate to each queue is 6 attendees per hour. No jockeying between queues is permitted. Which system is better in terms of the average total time an attendee spends to check his/her email?

a.		Both systems have the same average total time
b		There is not sufficient information to answer this question
c		A system with four queues

14. Consider a stable system in which average interarrival time is 'a', average processing time is '3p' and there are 'm' servers who serve customers. What is the throughput (flow) rate of this system?

a		There is not sufficient information to answer the question.
b		3p/(m*a)
c		1/(3p)
d		a
e		1/a
f		3p