Activity Table Q2: Project Data from the Project Sponsor Predecessor Duration (months) Optimistic Most likely Pessimistic A 2 3 4 B A 1 2 3 C B 5 6 7 D C 2 4 6 E A 1 2 3 F A 2 4 6 G D, E 1 3 5 H D, E 4 5 6 I G, F 2 4 6 J C, F, G, H 1 2 3 K I 2 3 4 L J, K 1 2 3 (a) Construct the project network diagram using the Activity-on-Node approach, showing all the required information on the nodes. (b) What is the expected project duration? [24 marks] [1 mark] (c) What is the probability of completing the project by the end of the 25th month?