What is the total project completion time?

Activity

Immediate

Predecessors

Completion

Time $($Weeks$)$

A

N$/$A

$2$

B

A

$3$

C

A

$4$

D

B

$1$

E

B$,$C

$5$

F

D

$6$

G

E

$2$

H

E

$3$