Question: 4. [10%] The project network shown below, B A F start finish C E D has a set of activities with the following time estimates:

4. [10%] The project network shown below, B A F start finish C E D has a set of activities with the following time estimates: I 1 Time (weeks) Activity a m b A 4. 7 B 2 2 2 2 5 14 D 3 6 9 E 5 5 5 F 2 8 14 (a) Calculate the expected times and variance for each activity. (b) Obtain the critical path. (c) Calculate the expected project completion time and its standard devia- tion. (d) Initial assessments have given the project 26 weeks to be completed. What is the probability this project time will be met

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