Immediate Activity Predecessors Normal Crash Time Time (Weeks) (Weeks) Normal Crash Cost Cost A -- 4 3 $1500 $1800 B -- 2 1 $2000 $2500 3 3 3 $1700 $1700 D A 8 4 $2300 $2600 E B 6 3 $1600 $1840 F 3 2 $1200 $1300 G D, E 4 2 $1200 $1600 A D Start B E End F What is the minimum additional cost to reduce the project completion time to 9 weeks (first compute the critical path and then determine the sequence of activities to crash to bring reduce project completion time)