TmM A model for virtual memory performance is the average main memory access time, given by h Average main memor access time= Hit Ratio x Hit time + Miss ratio x Miss penalty, which is Equation 12.5 in the textbook. Explain why replacing a given replacement algorithm with an algorithm that more closely approximates the optimal replacement algorithm will improve, have no effect, have an unknown effect, or will worsen each of the factors of the average main memory access time equation.+