Data table (Expected rate of return and risk) Summerville Inc. is considering an investment in one of two common stocks. Given the information in the popup window: which investment is better, based on the risk (as measured by the standard deviation) and return of each? a. The expected rate of return for Stock A is 6. (Round to two decimal places) The expected rate of return for Stock B is \%. (Round to two decimal places) b. The standard deviation for Stock A is \%. (Round to two decimal places)