P2. Based on the Table below, ABCD Activity A Immediate Predecessor Time (days) E A F B G B.C H D 1 E,F *D4 8 20 33 18 20 9 10 8 (End) G, H, I a) Construct AOA and AON network diagrams. b) Perform the forward and backward pass analysis on the AON diagram. Indicate the critical path. c) What is the duration of the project? d) Calculate the total slack and free slack for all the non-critical activities