If the following program is executed, total how many processes will be created in the system $($including the first parent process $)?$

$1$: void main$($

$3$: int $c1=0,c2=0$;

$4$: $,c1=$ fork $()$ ;

$5$: $,c2=$ fork $()$

$6$: if & $c2==0$ fork $()$;

$7$:$,$

$7$

$3$

$9$

$5$