3. Below are the data for a Time-Cost CPM Scheduling analysis. The time is in days and the costs include both direct and indirect costs. Activity Immediate Predecessor NONE Normal Time Crash Time A Crash Cost $400 $600 B N-WN Normal Cost $200 $300 $300 $500 $500 1 $300 B,C D 3 1 2 $550 $900 2 1 a) Identify the critical path and the project duration. Critical path Project Duration b) If you crash this project to reduce the total time by four days, how much additional money would it cost? (Attempt to spend the lowest amount of money possible to reduce the project duration)