Problem 2: (10 Points) Given the following network and activity time estimates: 5 79,20 1 9 6,10,15 6 3,20,35 4.12.15 2 Start 2.7.16 3 4,8,11 4 3,10,15 11 Finish 2.9,14 7 3,6,9, 8 5,9,16 10 4,12,16 (a) Determine the expected time and variance for each activity by drawing the table with the format on Page 14 on Chapter 8 Notes. (b) Which path is the critical path? (c) Calculate the expected project completion time. (d) Calculate the project variance. 9 13 Probabilistic Activity Times Example Equipment installation 6.8.10 Equipment testing and modification 24.12 8 37.11ning debugging 10 1.4.7 System development Manual g 2 5 9 11 Finish Start 3,6,9 2.3.4 2,4,8 .10,13 System sing System changeover Poton recruiting 6 3.4.5, Job training 1.3.5 2221 Orientation Time Estimates (weeks) Time Mean Variance Activity a m b 1 V I 6 8 10 8 4/9 2 3 6 9 6 1 3 1 3 5 3 4/9 4 2 4 12 5 25/9 5 2 4 3 1/9 6 3 5 4 1/9 2 2 2 0 3 9 6 10 7 11 = 10 13 1442 16/9 4/9 I 9 4 Open With Drint 14