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 with 2 word blocks and 4 entries, initially empty, with LRU replacement policy: a. Provide address format (assume 16-bit address) b. Label each reference in the string as a heat or a miss c. Show content of the cache at the end.