Assume the network and data that follow:

ACTIVITY NORMAL TIME $($WEEKS$)$ NORMAL COST CRASH TIME $($WEEKS$)$ CRASH COST IMMEDIATE PREDECESSORS

A $2$ $ $501$ $ $70$

B $4802160$ A

C $8704110$ A

D $660580$ A

E $71006130$ B

F $4403100$ D

G $51004150$ C$,$ E$,$ F