in computer systems language 221 Please help to solve this with example ?? thank you

Q.1] There are several reasons that limits the compiler from optimizing a program. List three factors. blockers) is called memory aliasing. Give an example with your explanations where the compiler cannot optimize the code tQ.3] What are the two reasons that [Q.3] What are the two reasons that make loop unrolling performs better than the si instruction per iteration? Support your answer with an example