Activity 4.2 To complete the wing assembly for an experimental aircraft, Scott DeWitte has laid out the major steps and seven activities involved. These activities have been labeled A through G in the following table, which also shows their estimated completion times (in weeks) and immediate predecessors. This is shown in Table 3 (below). (c) 20 Activity a m b Immediate Predecessors A 1 2 3 B 2 3 4 C 4 5 6 A D 8 9 10 B E 5 C,D F 4 5 B G 1 2 3 E Table 3 Determine the following: a) Expected time and variance of each activity b) Network/ PERT diagram interconnecting all the activities according to Table 3 c) Critical path for the entire wing assembly project as well as the expected completion time for the total project d) Probability that the project will be completed in less than 17 weeks e) Develop a Gantt chart for project scheduling Content