5) Consider a memory system with the following parameters: T(c) 150 ns P(c)-0.01 cents / bit T(m) 1500 ns P(m) 0.001 cents / bit where T stands for access time, P for unit price, c for cache, and m for memory. a) What is the cost of 1 MByte of main memory? b) What is the cost of 1 MByte of main memory using cache memory technology? c) If the effective access time is 20% greater than the cache access time, what is the hit ratio