Problem 2. (Cache Memory Organization) (30 points) A fully associative mapped cache has 16 block frames with eight words per block. The size of main memory is 210 words, and cache is initially empty. Access time of the cache is 40 ns, and the time required to transfer eight words between main memory and the cache is 14Ls (A) Show this fully associative mapping and the address bits that identify the tag and word fields (B) Compute the hit ratio for a program that executes from memory locations 20-45, then loops four times from memory locations 28 45 before halting. Assume that when there is a miss, the entire cache slot is filled in 1us, and the first word is not seen by the CPU until the entire slot is filled. That is, assume load-through is not used, the cache is empty. You may leave the hit ratio in terms of a fraction. (C) Compute the effective access time for the program described in part (B) above