Consider the following table of activities that describes a project network. What is the first activity you would crash? Normal Crash duration duration Activity Predecessors (days ) (days) Normal cost Crash cost A - - 5 $1, 000 $4, 060 A 8 $4,900 $7,000 A 7 $ 2,000 $4,090 B, C 6 $ 1,000 $ 2, 000 B, C $5,000 $8,000 B, C 10 $3,000 $ 5,000 D, E, F 5 $ 2,000 $ 5,060