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: This exercise contains only parts b, c, and d. b) The critical activities for the leadership training program development project are Activity Immediate Predecessor(s) Time (days) A 4 B 6 3 B 10 E A, D FC C 255 G E, F 10