Here is a series of address references given as word addresses:
2, 3, 11, 16, 21, 13, 64, 48, 19, 11, 3, 22, 4, 27, 6, 11
a). Assuming a direct-mapped cache with 16 one-word blocks that is initially empty, label each reference in the list as a hit or a miss and show the final contents of the cache.
b). Using the series of references given above, show the hits and misses and final cache contents for a direct-mapped cache with a four-word blocks and a total size of 16 words.