(a) Why do we need parallel computing systems? State some important applications of parallel computers. (b) Explain the different types of parallelism exploited by contemporary parallel computing systems. (c) Explain the major's problems faced to achieve a linear speedup with parallel computers. (d) Suppose you want to achieve a speed-up of 8 times faster with 10 processors. What percentage of the original computation can be sequential? (e) Explain Flynn's taxonomy for classifying computer architectures. Briefly describe each of the categories with an example of a real machine in that category