A project management problem is identified with activities, predecessors, mean activity durations (in weeks), the variance of activity durations, crashing costs per week ($ per week), and maximum possible crash weeks as below. Crashing Mean cost per Maximum Variance duration week Activity Predecessors crash (o) (u) weeks week) ($ per A 3 1 - B A 5 1 200 3 A 6 1 300 3 D B, C 7 2 400 1 E B, D 9 3 600 1 | C, D 3 1 100 3 G D, E, F 8 2 500 1 What is the standard deviation of the critical path after crashing the project duration by three weeks? 2.45 O 2.65 O 1 O 2.24 03 Question 30 2 pts Your recommendations on crashing the project duration by three weeks have been followed. Now, assuming each activity time durations follow the normal distribution, what is the probability that the project can be completed between 27 and 33 weeks? 95.4% 31.7% 68.3% 99.7% 4.5%