Question: 1.You have a network with a critical path A-B-C-D.The values for optimistic (a), pessimistic (b) and most likely (m) durations for each task are as

1.You have a network with a critical path A-B-C-D.The values for optimistic (a), pessimistic (b) and most likely (m) durations for each task are as shown below.

Task a m b Te Var

A 6 8 12

B 3 4 6

C 3 9 12

D 5 5 7

a.What is the value of for the network?

b.What is the value of ² for the network?

c.What is the probability that this network can be finished within 27 days?

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