Activity list for Roofing Project Activity ID Activity Description Duration Predecessors A Move in 4 B 10 A 3 D 2 Set up scaffolds Tear off old shingles Inspect roof truss and deck Remove old shingles to recycling yard Order and deliver new shingles Install new shingles B (SS 2) C(FS 2) C (FF 1) G (SF 1) E 2 F 5 G 4. D H Clean up 2 G I Move out 2 H O Under Predecessors, the following notation is used: X (FS #): Activity X must finish # days before this activity can begin. X (SS #): The # of days after activity X starts. And then this activity can begin. X (FF #): This activity cannot finish until # days after activity X is completed. X (SF #): This activity must finish # days before x can start. 1. Calculate the ES, EF, LS, LF, TF, and FF and complete the table below: (8.1 points) Activity ID ES EF LS LF TF FF Activity Description Move in A B C D Set up scaffolds Tear off old shingles Inspect roof truss and deck Remove old shingles to recycling yard Order and deliver new shingles Install new shingles E F. G H Clean up I Move out Note: Each cell will be graded with a 0.15 point. 2. Calculate the total project duration (0.9 point) 3. Identify the critical path(s). (1 point)