(Answered) A network consists of the following list. times are given

Management Studies

A network consists of the following list. Times are given in weeks.

Activity	Preceding	Optimistic	Probable	Pessimistic
A	--	2	3	4
B	A	4	4	8
C	A	3	5	7
D	B	5	5	5
E	B,C	3	6	7
F	D	4	5	9
G	E, F	3	3	7

a. Draw the network diagram.

b. Calculate the expected duration and variance of each activity.

c. Calculate the expected duration and variance of the critical path.

d. Calculate the probability that the project will be completed in less than 24 weeks.

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