The accompanying data file shows monthly stock prices (in \$) for Corporation A and Corporation 8 over the past five years Click here for the Fxcel Data Fle a-1. Calculate the mean and the standard deviation for Corporation A Note: Round final answers to 2 decimal places. a-2. Calculate the mean and the standard deviation for Corporation 8 Note: Round final answers to 2 decimal places. b. Which corporation had the higher average stock price over the time period? Which corporation's stock price had greater dispersion as measured by the standard deviation