PLEASE HELP WITH TWO QUESTIONS BELOW - THANK YOU.

Q1:

THE ANSWER "D) D IS CRITICAL, AND HAS A SLACK OF TWO DAYS" IS INCORRECT. WHAT'S THE CORRECT ANSWER?

Q2:

THE ANSWER "C) C; $1000" IS INCORRECT. WHAT'S THE CORRECT ANSWER?

Activity D on a CPM network has predecessors B and C, and has successor F. D has duration 6. B's earliest finish is 18 , while C 's is 20 . F's late start is 26 . Which of the following is definitely TRUE? A) B is a critical activity. B) C is completed before B. C) D has no slack but is not critical. D) D is critical, and has a slack of two days. E) F is critical, and has zero slack. Two activities on different critical paths that share no common nodes are candidates for crashing on a CPM network. Activity details are in the table below. To cut one day from the project's duration, the manager should crash activity(ies) adding to project cost. A) B; $2,000 B) C; $2,000 C) C; $1,000 D) B \& C; $3,000 E) B \& C; $4,000