A company must perform a maintenance project consisting of seven activities. The activities, their predecessors, and their respective time estimates are presented below: Designation A B Time in Days 3 3 C. Activity Break down both machines Clean machine 1 Clean machine 2 Re-set machine 1 Re-set machine 2 Re-calibrate both machines Final test Immediate Predecessor None A A B C D and E 3 D 4 E 2 1 F 1 Using CPM, which activities have slack In this project? Multiple Choice O onyo BD ABC O C.E F G A company must perform a maintenance project consisting of seven activities. The activities, their predecessors, and their respective time estimates are presented below: Designation A B C D E F Immediate Predecessor None A A Activity Break down both machines Clean machine 1 Clean machine 2 Re-set machine 1 Re-set machine 2 Re-calibrate both machines Final test Time in Days 3 3 3 B 4 2 1 D and E F 2 Using CPM, which activities make up the critical path? Multiple Choice A C, E, F. G None of these ADE O AC, BF, E A B,D,F,G