The table shown below, which lists the normal and crash durations, and costs for a project, comprising of seven activities, and the network diagram for said project. All durations are in days, and all costs are in dollars. The network diagram for the project is also shown below. 1 Activity Immediate Normal Normal Predecessor Duration Cost 6 100 10 3 4 4 7 2 ABCDEFG B J A B, C D D E 200 50 150 250 200 50 4 125 Crash Crash Duration Cost 4 500 10 200 2 300 4 150 450 200 100 71 F 3 7 1 Required: Determine a) The critical path; b) The normal duration and the normal cost of the project; and c) By how many days can this project be crashed, and at what cost,