Roger Ginde is developing a program in supply chain management certification for managers. Ginde has listed a number of activities that must be completed before a training program of this nature could be conducted. The activities, immediate predecessors, and times appear in the accompanying table: Activity Immediate Predecessor(s) Time (Days) A 2 5 1 B 10 E AD 3 F 6 G EF 8 B D a. Develop an AON network for this problem. b. What is the critical path? c. What is the total project completion time? d. What is the slack time for each individual activity