Q3: (total 15 marks) (1) Add comments to the following MIPS code (12 marks) and (2) describe in one sentence what it computes ( 3 marks). Assume that $a0 and $a1 are used for the input and both initially contain the integers a and b, respectively. Assume that \$v0 is used for the output. add \$to, \$zero, \$zero loop: beq \$a1, \$zero, finish add \$t0, \$to, \$a0 sub \$a1, \$a1, 1 j loop finish: addi \$t0, \$t0, 50 add \$v0, \$to, \$zero