Consider the following list of activities with time (in months) Activity A B C D E F G H Immediate Predecessor ----- ----- A A,B A,B C D,F E,G   Activity Optimistic Most Probable Pessimistic A 4.5 5.0 5.5 B 3.0 3.5 5.0 C 8.5 9.5 10.0 D 4.0 5.5 6.0 E 5.5 6.5 8.0 F 6.0 7.5 8.5 G 5.0 6.0 7.0 H 3.0 4.0 5.0   a) Identify the critical path c) What is the variance of the project completion time? d) What is the probability of completing in 31 months?

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