We are (manually) optimizing a program that spends 2 % (percent) of its execution time on disk accesses. We are optimizing the processor, so we cannot apply any optimizations to disk accesses. Complete the following statements (your answers should be numbers): A. To get a speedup of 25 on the entire program we need our optimizations to produce a speedup of at least on the source code we do have. B. No matter how good our optimizations are, the overall speedup we can achieve can never exceed