(Expected rate of return and risk) Carter Inc. is evaluating a security. Calculate the investment's expected return and its standard deviation. 8% PROBABILITY RETURNO 0.15 4% 0.40 0.30 10% 0.15 14% (Click on the icon located on the top-nght corner of the data table above in order to copy its contents into a spreadsheet.) a. The investment's expected rate of return is %. (Round to two decimal places)