The activity details and their predecessors are given below use the PERT method to calculate the expected time (1 Mark) and construct the network diagram (1 Mark) to find the critical path of the activity (1 Mark) also indicate the project duration (1 Mark) with the standard deviation (1 Mark). Activity Predecessors the expected Optimistic Most likely time time time (to) (tm) A B A CG D B E,F G,H A B C D E F G H 4 1 7 6 2 3 6 9 7 13 21 1 13 24 16 14 6 10 15 14 Pessimistic time (tp) 16 1 30 1.0 28 4 3 19 8 16 Enter the expected activity time for A. Enter the expected activity time for B. Enter the expected activity time for C. Enter the expected activity time for D. Enter the expected activity time for E. Enter the expected activity time for F. Enter the expected activity time for G. Enter the expected activity time for G. Enter the expected activity time for G. Enter the expected activity time for G. Find the critical path value for the total project duration? Standard deviation