This is a brief $C$ exercise. $($The labs will require comfort and fluency in C$.)$ Below is a

snippet of code:

void op$1($int a$,$ int b$)\{$

$\}$

$a=a+b$;

void op$2($int$*$ a$,$ int$*$ b$)\{$

$\}$

$**a=**a+**b$;

int main$()\{$

int $a=1,b=1,c=1,d=1$;

op$1($a$,$ b$)$;

op$2($&c$,$ &d$)$;

$\}$

return $0$ ;

What are the values of $a,b,c,$ and $d$ right before the program exits? Since the purpose

of this exercise is to build your skills, you should do this problem without compiling and

running the program.