If

A

$,$

B

$,$

$$and

C

$$are three activities connected with

S

S

$$and

F

F

$($

combination

$)$

$$relationships with

$2$

$-$

day lag on each relationship. Their durations are

$5$

$,$

$1$

$0$

$,$

$$and

$3$

$$; respectively. What is the duration of the project: