Complete a Network Planning Model analysis using the information below. (10 pts) Task Immediate Predecessors Time (weeks) ES EF LS LF Slack A 6 B A 5 C A 4 D C 5 E B, D 3 F C 7 G E,F 8 a. Construct a CPM network for this project. b. Identify the critical path for this project. What is the total completion time for this project? c. Compute the ES, EF, LS, LF, and slack times for each activity. d. Suppose D could be shortened by two weeks. What effect would this have on the completion date?