(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 39 percent Calculate the investment's expected return and its standard deviation Should Gautney invest in this security Probability 0:10 Return -6% a. The investment's expected return is % (Round to two decimal places) Return Probability 0.10 0.45 0.35 0.10 -6% 1 % 7 % 8% a. The investment's expected return is (%. (Round to two de