Assume you are responsible for the project whose data is presented below. The network for this project is included as a separate attachment. Activity Predecessors A Duration (hrs) 8 200 12 4 B A D IM O ALLO E w 40 B EL G 32 Description Develop material list Procure pipe Erect Scaffold Remove scaffold Deactivate line Prefabricate sections Install new pipes (deleted from work plan) Fit pipes and valves Procure valves Install valves Remove old pipes/valves Insulate Pressure test Cleanup and startup H I 8 GK A 225 J K L 8 LL 35 CE O Z 37 M 24 GK N 6 I D.N o 4 (a) On the separate network attachment, determine the early, late, and slack (total and free) activity times for each activity. What are the duration and critical path for this project? (b) List all the different paths in the network in decreasing order of criticality index in the tabulated form shown below. The criticality index is defined as follows. Let Sk= sum of total slack values for all activities on path k Smax = max {S) Cx= [(Smax - S&S max]* 100% Define the most critical path as the one with Cx= 100%. k Activities in path Ck 1 2 3 n