. . 3.8 Roger Ginde is developing a program in supply chain management certification for managers. Ginde has listed a num- ber of activities that must be completed before a training program of this nature could be conducted. The activities, immediate pre- decessors, and times appear in the accompanying table: IMMEDIATE ACTIVITY PREDECESSOR(S) TIME (DAYS) A N B 5 B 10 inman A. D W C 6 G E, F 8 a) Develop an A ON 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? PX