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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) 10 B 6 2 2 E AD 3 5 G EF 8 - B This exercise contains only parts b, c, and d b) The critical activities for the leadership training program development project are A-E-G c) The project length for the leadership training program development project = 21 days a) Stack time for each of the activities is. Activity Slack Time