3. Here is a sequence of word (-4B) addresses during execution of some program: 4, 16, 0, 20, 52, 68, 172, 64 Assuming a fully associative cache (that uses LRU replacement) with 4 word blocks and 4 entries, initially empty: a. Provide address format (assume 16-bit address) and the cache organization b. Label each reference in the string as a heat or a miss c. Show content of the cache at the end