Consider the following project. Activity Immediate Predecessors A B D E F G H A B CD D E EF Normal Duration (months) 3 4 2 6 8 7 4 9 Normal cost ($) 700 900 1,100 600 800 1,300 500 800 4) C (2) () 6 (4) A(3) O--- ( )= months B(4) Oc H(9) 0 (6) F() (a) List all the paths in the network diagram. Say which ones are critical paths and what the minimum project duration is. (b) For each activity compute ES, EF, LS, LF and slack. Then, say which activities are critical (c) What is the cost of completing the project if its duration is what you obtained in (b)? (d) You are told that the project needs to be completed in 24 months. Determine which activities need to be crashed and what will be the incremental cost, given the following data: Activity Crash time (months) Crash cost ($) 750 900 A B D E F G 4 1 5 6 5 4 6 1,150 700 1,100 1,700 500 2,300