Suppose that a computer using direct mapped cache has 232 bytes of byte-addressable main memory, and a cache of 256 blocks, where each cache block contains 16 bytes. a. How many blocks of main memory are there? b. What is the format of a memory address as seen by the cache, 1.e., what are the sizes of the tag, block, and offset flelds? c. To which cache block will the memory address 1120006416 map