a) What is the estimated standard deviation (in weeks) for the critical path completion?

b) What is the probability that the critical path for this project will be completed within 75 weeks? 80 weeks? 85 weeks? 90 weeks?

c) Within what amount of time (in weeks) is there a 90% probability that the critical path for this project will be completed? 95%? 99%?

EVENTS (NODES) ACTIVITY START FINISH A 1 2 B 1 3 C 2 4 D 2 5 E 3 5 F 4 6 G 5 6 H 7 TIMES OPTIMISTIC MOST LIKELY PESSIMISTIC 9 15 21 13 21 23 6 9 18 23 35 47 19 26 27 23 29 41 14 20 26 2 5 8 no ON 8