Cray Computer Corporation is developing a new super computer. The table below lists the project activities. normal and crash times, and normal and crash costs. Activity A Co De Description Design Evaluate equipment Write methods report Build prototype Write equipment report Test prototype Write final report Immediate Predecessor(s) F.F Time (weeks) Crash 10 Normal 342 6+ 74 302 442 Cost ($1.000) Normal Crash 200 200 80 100 500 80 125 20 140 45 170- 30- 160- 105 a. Draw an activity network diagram for this project. Using the normal activity times, determine the early start, early finish. late start, and late finish times for each activity. Record these values in the diagram.