Assume $t0 is used for the first parameter, $t1 for the second parameter, and $t2 for the return value. Convert the following C statements to assembly using the program stack.
a) Utilize $t0, $t1, $t2
b) Replace $t0, $t1, $t2
c) Ignore $t0, $t1, $t2
d) Manipulate $t0, $t1, $t2