please show every step. Ty

(Related to Checkpoint 7.1) (Expected rate of return and risk) B. J Gautney Enterprises is evaluating a security. One-year Treasury bills are currently paying 55 percent. Calculate the investment's expected return and its standard deviation Should Gautney invest in this security Probability Return 0.10 -4% 3% 0.45 7% 0.10 9% (Click on the loon in order to copy its content to a spreadsheet) 035 a. The investment's expected return is (Round to two decimal places Related to Checkpoint 7.1) (Expected rate of return and risk) B.J. Gautney Enterprises is evaluating a security One-year Treasury bills are currently paying 29 percent. Calculate the investment's expected return and its standard deviation Should Gautney invest in this security? Probability Return 0.15 -3% 0.30 2% 0.40 4% 0.15 (Click on the icon in order to copy its contents into a spreadsheet) a. The investment's expected retum is % (Round to two decimal places)