A computer with cache access time of 20 ns, a main memory access time of 4000 ns, and 95% hit ratio. Calculate the average memory access time for this computer.

b. Cache consists of 256 lines, Main memory contains 32K blocks of 16 words each. Show the format of main memory addresses and the cache format for the following mapping: a. Fully associative Mapping

b. A four-way set associative Mapping.