Question $1.$

Encode R$-$type instruction into machine code using $18,19,20$ registers:

a$.$ add $$s0,$$$s1,$$$s2$ # add rd$,$ rs$,$ rt

b$.$ sub $$s0,$$$s1,$$$s2$ # sub rd$,$ rs$,$ rt

c$.$ mul $s$0,$ $s$1,$ $s$2$ # mul rd$,$ rs$,$ rt

Hint: You can use MIPS reference Sheet available on Canvas.

$$s0=16$

$$s1=17$

$$s2=18$

$$s3=19$

$$s4=20$

$($$$s0-$$$s716-23)$

R$-$Format:

$\backslash$table$[[$op$,$rs$,$rt$,$rd$,$shamt funct,$],[000000,00000,00000,00000,00000,000000]]$