Given the activities whose sequence is described by for the following table, draw the appropriate activity$-$on$-$arrow $($AOA$)$ network diagram.

ACTIVITY IMMEDIATE PREDECESSOR$($S$)$ TIME$($DAYS$)$

A $-----5$

B A $2$

C A $4$

D B $5$

E B $5$

F C $5$

G E$,$F $2$

H D $3$

I G$,$H $5$

a$.$ Which activities are on the critical path?

b$.$ What is the length of the critical path?

a$.$ Critical path is A$$C$$F$$G$$I

b$.$ Time $=21$ days

a$.$ Critical path is A$$C$$F$$G$$I

b$.$ Time $=11$ days

a$.$ Critical path is B$$C$$F$$G$$I

b$.$ Time $=21$ days

a$.$ Critical path is A$$C$$F$$G$$I

b$.$ Time $=22$ days