Problem $4-9($Static$)$

The R&D department is planning to bid on a large project for the development of a new communication system for commercial planes. The accompanying table shows the activities, times, and sequences required:

ACTIVITY IMMEDIATE PREDECESSOR TIME $($WEEKS$)$

A $3$

B A $2$

C A $4$

D A $4$

E B $6$

F C$,$ D $6$

G D$,$ F $2$

H D $3$

I E$,$ G$,$ H $3$

b$.$ What is the critical path? $($You may select more than one answer. Single click the box with the question mark to produce a check mark for a correct answer and double click the box with the question mark to empty the box for a wrong answer.$)$

check all that apply $1$

A$-$C$-$F$-$G$-$I

A$-$B$-$E$-$Iunanswered

A$-$D$-$H$-$Iunanswered

A$-$D$-$F$-$G$-$I

c$.$ Suppose you want to shorten the completion time as much as possible, and you have the option of shortening any or all of B$,$ C$,$ D$,$ and G each one week. Which would you shorten?