Consider the following MIPS procedure. Note that $a0 and $a1 are input arguments and both initially contain the integers a and b, respectively. Assume that $v0 is used for the output.

a. Add comments to describe what each line in assembly is doing, then summarize in one sentence what the whole program accomplishes.

b. This code can be optimized, i.e. written using fewer instructions. Re-write the code using at most 3 instructions.

add $t0, $zero, $zero beq Sal, zero, finish add $t0, $to, $a0 addi $al, $al, -1 j loop #2 loop: finish: addi $t0, $to, 100 add $vO, $to, $zero