Use the Critical Path Method (CPM) and Project Evaluation & Review Technique (PERT) to answer the next three questions (show your work without which answers will not be accepted) The following table of probabilistic time estimates (weeks) & activity predecessors are given for a project, Table 9.3 Time Estimates (weeks) Activity Activity Predecessor A 7 B 4 10 C 2 I 12 B, C 5 15 D 3 m 15 18 B 19 15 A D 16 12) (S) (show your work) Using Table 9.3, the expected time to complete activity A is: A) 7.33 weeks. B) 8.00 weeks C) 7.67 weeks. D) 5.00 weeks. 13) (S) (show your work) Using Table 9.3, the variance of the project's total completion time is: A) 5.222. B) 5.472. C) 4.872. D) 3.752. 14) (S) (show your work) Using Table 9.3, the probability that the project will take longer than 33 weeks to complete is approximately A) 0.68 B) 0.81. C) 0.19. D) 0.32