QUESTION $3$:

The following programme is compiled on the same processor:

#define var$1$ last digit of your registration number

#define var$2$ digit of your registration number before the one used in var$1$

#define var$3$ digit of your registration number before the one used in var$2$

int $x=$ var$1$;

int $y=$ var$2$;

int $z=$ var$3$;

int sum $=0$;

sum $=x+y+z$;

Compilation of the program gives the following assembly code:

addi $$1,$$$0,0$

addi $$1,$$$0,$ var$1$

sw $$1,0($$$0)$

addi $$1,$$$0,$ var$2$

sw $$1,4($$$0)$

addi $$1,$$$0,$ var$3$

sw $$1,8(R0)$

addi $$1,$$$0,0$

sw $$1,12($$$0)$

Iw $$2,0($$$0)$

Iw $$3,4($$$0)$

Iw $$4,8($$$0)$

add $$5,$$$2,$$$3$

add $$5,$$$5,$$$4$

sw $$5,12($$$0)$

$$