Robert Ginde is developing a program a 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)

A | - | 4

B | - | 7

C | - | 2

D | B | 10

E | A,D | 3

F | C | 6

G | E,F | 10

Calculate and explain how you found the slack times for each activity in the simplest possible way?