Problem 4 The following table provides the information necessary to construct a project network and project crash data: Predecessors Activity A B D E A A Normal Time Crash Time (weeks) (weeks) 14 9 8 6 5 4 4 2 6 4 10 7 15 10 Normal Cost Crash Cost $1,000 $1,800 $500 $700 $600 $1,300 $1,500 $3,000 $800 $1,600 $3,000 $4,500 $5,000 $8,000 B B F G DEF a. Construct the project's network. Under normal time, what are the project's duration; project total cost; and the critical path? b. Calculate the crashing cost per week for each activity c. If the goal is to complete the project in 36 weeks, which activities should we crash and by how much and what will be the minimum total cost? Show all the steps