The following table of probabilistic time estimates (in weeks) and activity predecessors are provided for a project. Activity Immediate Predecessor Optimistic Time Most Probable Time Pessimistic Time A - 5 11 14 B - 3 3 9 C - 6 10 14 D A, B 3 5 7 E B 4 6 11 F C 6 8 13 G D, E 2 4 6 H F 3 3 9 Using Table 1, the variance of the project's total completion time is approximately A. 1.36 в. 1.78 C. 2.03 D. 4.14 E. None of the above