Question $2(3$ points$).$ A program$$s main function is as follows:

int main$($int argc, char $*$argv$[])\{$

char $*$str $=$ argv$[1]$;

while $(1)$

printf$("\%$s$",$ str$)$;

return $0$;

$\}$

Two processes, both running instances of this program, are currently running invoked by

wish$>$ main a && main b

For each of the following output, tell if it is possible:

Output $(...$ means not ending yet$)$ A$.$ Possible, B$.$ Not Possible

abababab...

aaaaaaaa...

bbbbaaaa