QUESTION 27 If (r = --.4), then the relationship between X &Y is negative and strong True False QUESTION 21 Activity D on a CPM network has predecessors B and C and has follower F. D has duration 6. B's earliest finish is 18, while C's is 20. F's late start is 26. Which statement of the following is true D has no slack but is not critical C is completed before B F is critical and has 3 days slack D is critical and has zero slack