Q1. To complete the engine assembly for a prototype Hydrogen Proton SUV, the Operation Manager has laid out eight major activities involved. These activities have been labeled from A through H in the following table below, which also show their estimated completion times (in weeks) and immediate predecessors. Construct an AON and answer the questions that follow. [ 25 marks] a m Duration Activity Predecessor Optmistic Most Likely Pesismatic Expected Time Variance b t o? A 1 2 3 B 2 3 4 A, B 1 2 3 D 2 4 6 E C 1 4 7 F D 1 2 9 G E, F 3 4 11 H G 1 2 3 (5marks) (5marks) a) Construct an Activity on Node (AON) project network diagram. b) Find the expected time (duration) for each activity c) Find the variance of each activity d) Calculate the scheduling time and slack time for each activity. e) Find critical path activities and project duration (5marks) (5marks) (5marks)