In designing a new computer system, we make an enhancement that improves some mode of execution by a factor of 10. This enhancement takes 50% of the time when the enhanced mode is in use. (Recall that Amdahl's law uses the fraction of the original, unenhanced execution time to find speedup) a) What is the speedup that we have obtained by using this fast mode? b)What percentage of the original execution time has been converted to fast mode