QUESTION 1 The table below shows three time estimates for a series of activities to be carried out in one ofme electrical workshops at your institution. Estimated task times for works to he completed Task ' eeks WM\" Duration Duration Duration AB I- 7" A-1 3 BC E 12 14 3-D l 2 C-E 3 4 3 5 C-F \"1- 9 3 4 3 n-F EH F43 FH T 10 12 FJ 1 2 3 GI l 2 3 2 1 4 JL e- 3 a) Using an 'Activity on Arrow\" (AoA) approach, develop a logic network showing the activity durations, mean earliest start and latest completion times for each activity. {12 marks) 1)) Identify different paths, including the critical path and the estimated overall mean duration for the wiring work (4 marks} c) Calculate the probability of the wiring work package being completed by week 20. (4 marks}