b) A computer has a memory unit of 8G and a cache memory of 256K bytes. The cache uses direct mapping with a block size of 16 bytes, i) How many bits are there in the tag, index, block, and word fields of the address format? ii) How many bits are there in each cache word, and how are they divided into functions? Include a valid bit? iii) How many blocks can the cache accommodate? iv) For memory address of 8ECDB314 (hex) in an expanded memory, what are the equivalent field bits of) tag, index, block and word in cache? v) What is the net size of the cache (in bits)? Top at