Given is a CPM project network diagram as shown below.

Activity

Start

A

B

C

D

E

F

G

H

End

days

$0$

$2$

$4$

$2$

$4$

$3$

$6$

$3$

$3$

$0$

a$)$ The Project Completion time $=$ Question Blank $1$ of $4$ days.

b$)$ The Earliest Start time, ES$,$ of Activity G $=$ Question Blank $2$ of $4$ days.

c$)$ The Latest Finish time, LF$,$ of Activity C $=$ Question Blank $3$ of $4$ days.

d$)$ The critical activities are $=$ Question Blank $4$ of $4($ex$.$ Fill in answer as: ABCD$)$