Assume that we make an enhancement to a computer that improves some mode of execution by a factor of 10. The enhanced mode is used 50% of the time, measured as a percentage of the overall execution time when the enhanced mode is in use (i.e., after the hardware has been modified to include the enhancement). Recall that Amdahls law refers to the fraction of the original unenhanced execution time that could make use of the enhanced mode; thus we cannot directly use this 50% figure to computer overall speedup with Amdahls Law.

1. What is the overall speedup we have obtained by modifying the hardware to include the enhancement?
2. What percentage of the original execution time has been converted to use the enhanced mode?