You have just used the network planning model and found the critical path length is 60 days and there are two critical paths. The standard deviation of the first critical path is 10 days and the standard deviation of the second critical path is 15 days. The probability that the project will be completed in 70 days or less is equal to (2 decimal accuracy) O A. 0.16 B. 0.84 C. 0.75 D. 0.66. O E. 0.25. A simple CPM network has three activities, N, O, and P. N is an immediate predecessor of O and of P. O is an immediate predecessor of P. The activity durations are N = 9,0 = 7, P = 5. A. The network has no critical path. B. The critical path is N-O-P, duration 7. C. The critical path is N-O-P, duration 21. O D. The critical path is O-P, duration 12. E. The critical path is N-P, duration 14