The diagram below shows the activities on the nodes from the Project Management, and the table shows the normal time and crash time (in days) and cost for each activity. Determine which activities should be crashed to shorten the project by 1 day. B Start D E Activity Normal Time Crash Time Cost per day to crash A 6 6 B 10 8 $100 5 4 $300 Na a D 4 1 $700 7 $500 2 1 $650 OD w