Three enhancements with the following speedups are proposed for a new computer architecture: Speedup 1 = 30 for enhancement 1 Speedup2 = 20 for enhancement 2 Speedup3 = 15 for enhancement 3 Only one enhancement is usable at a time. Using Amdahl's Law to do the following: (a). For a given testing benchmark, what is the speedup if only enhancement 1 can be used and the fraction of using enhancement 1 in the benchmark is 30%? (b) For a given testing benchmark, if enhancement 1 and enhancement 2 are each usable for 25% of the time, what fraction of the time must enhancement 3 be used to achieve an overall speedup of 10? (c) Assume for some benchmark, the possible fraction of use is 15% for each of enhancements 1 and 2 and 70% for enhancement 3. We want to maximize performance. If only one enhancement can be implemented, which should it be? If two enhancements can be implemented, which should be chosen