Table 2.1 below consists of data collected for a project: Act Predecessor Optimistic Most likely Pessimistic a - 3 6 8 b - 2 4 4 c - 1 2 3 d a,b 6 7 8 e c 2 4 6 f e 6 10 14 g e 1 2 4 h d 3 6 9 i g,h 10 11 12 j f,g 14 16 20 3

2.1 Using PERT, calculate the time (t) for each activity. (10)

2.2 Draw the network diagram (AON) based on the above and identify the critical path.