Question: 4. Consider the following AoN network and the table including associated activity times (optimistic-a pessimistic-b and most likely-c) for a PERT project. (14 P) A

4. Consider the following AoN network and the

4. Consider the following AoN network and the table including associated activity times (optimistic-a pessimistic-b and most likely-c) for a PERT project. (14 P) A F T S B D E a m Activity b 28 22 B 24 4 8 10 9 12 15 10 15 17 13 19 21 D 23 26 E F 33 a. Find the expected activity times Eti) and their variances v(ti). (8 P) b. Find the critical path and its length by inspection. (3P) c. Find the variance of the length of the critical path v(CP). (3 P)

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