4)

Activity Predecessor(s) Optimistic Most likely Pessimistic

A none 4 8 10

B A 2 8 24

C A 8 12 16

D A 4 6 10

E B 1 2 3

F E, C 6 8 20

G E, C 2 3 4

H F 2 2 2

I F 6 6 6

J D,G,H 4 6 12

K I, J 2 2 3

1. What is the expected time for activity C?
2. What is the variance for activity C?
3. Based on your calculation of expected times, what is the critical path?
4. What is the estimated time of the critical path?
5. What is the activity variance along the critical path?
6. What is the probability of completion of the project before week 36?