Certiport is developing a leadership training program for managers. The project leader 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) A B C D E F Time (days) 10 6 1 2 3 5 8 B A,D C E, F a) Draw the correct precedence diagram below. b) Create a table highlighting calculations for determining slack time. a c) What are the critical activities for the leadership training program development project? d) Is the project length the sum of the time in days (see above table). If yes, what is the length. If not, explain why and then show how to determine the project