1. In an 4-way set associative cache, each data words are 64-bit long and the memory is byte addressable (1.e., each words are addressed to the byte). The size of the cache is 16 MB, the size of the block is 16 data words, and the physical addresses are 64 bit long. a. What is the total number of blocks in the Main memory and the number of blocks (lines) in the cache? b. What is the total number of sets in the cache? c. How many bits of tag, index (set number), and block offset are needed to support references to this cache