Activity Immediate Predecessor Optimistic Time (O.T.) Mostly Likely Time (M.T.) Pessimistic Time (P.T.) A NONE 4 7 9 B A 2 4 6 C A 6 9 9 D B, C 5 5 5 E C 2 5 9 F D, E 3 3 6 (a) What is the expected time for each activity? (2 points) (b) What is the variance for each activity? (2 points) Use both the longest path method and ES/EF; LS/LF method for questions (c), (d) and (e). (c) What is the expected project completion time? (2 point) (d) What are the critical activities? (1 points) (e) What are the slack values for non-critical activities? (4 points) The Longest Path Method ES/EF/LS/LF Expected project finish time Critical activities Non-critical activities (slack values) (f) What is the probability that the project will be completed in 26 weeks? (2 points) (g) What is the probability that the project will be completed in 23 weeks? (2 points)