The following table represents the optimistic, most likely, pessimistic durations of activities and variance of the duration of each activity that belong to a project. It is computed that the critical activities of the project are A, C, E, F. What is the probability that the project will be completed within 21 months? Pessimistic Duration Variance Activity Optimistic Duration Most Likely Duration 1 5 0,444 B 1 2. 3 0,111 5 7 0,444 D 2. 4 6 0,444 E 5 6 19 5,444 F 4 5 12 1,777 A) %63.6 B) %20.1 C) %29.8 D) %70.1 E) %36.3