In the project detailed in table below, activity labels indicate the major activities to be completed in a project. Normal Duration (hours) Normal Immediate Cost ($) Crash Duration (hours) 2 Crash Cost (S) Activity A Predecessors 2 10 0 None B 3 15 2 23 A 5 25 4 30 D 3 20 1 24 6 30 4 45 E F B C CE F 1 5 1 0 G 7 35 6 50 H 10 50 7 80 D,G 1- Construct the network for this project. 2- Identify the critical path and the normal completion time. If we want to crash the duration of the project by four hours, specify which activities must be chosen to be crashed and what are the new duration and cost of the project