From the following information, determine the cost to crash the project to the shortest possible duration. Activity Design Laptop Build Prototype Evaluate Design Test Prototype Write Manual Prep Production Test Production Activity Predecessor(s) Time Label (Wks.) 21 5 7 2 5 8 2 A B C D E F G - A A B C, D C, D E, F Minimum Per Week Crash Time 18 3 5 1 5 6 1 Cost $200 $100 $250 $300 $150 $300