A 2-way set associative cache consists of four sets. Main memory contains 2K blocks of eight words each. a. Show the main memory address format that allows us to map addresses from main memory to cache. Be sure to include the fields as well as their sizes. b. Compute the hit ratio for a program that loops 3 times from location 8_10 to 51_10 in main memory. You may leave the hit ratio in terms of a fraction