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An enhancement to a computer accelerates some mode of execution by a factor of 10. The enhanced mode is used 50% of the time, measured as a percentage of the execution time when the enhanced mode is in use. Recall that Amdahl's Law depends on the fraction of the original unenhanced execution time that could make use of enhanced mode. Thus the 50% measurement cannot be used directly to compute speedup with Amdahl's Law. I What is the speedup obtained from fast mode? I What percentage of the original execution time has been converted to fast mode?

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