(Expected rate of return and risk) Carter Inc. is evaluating a security. One-year Treasury bills are currently paying 8.7 percent. Calculate the investment's expected return and its standard deviation. Should Carter invest in this security? PROBABILITY 0.10 0.50 0.30 0.10 RETURNO 4% 9% 10% 15% Carter Inc. is evaluating a security. One-year Treasury bills are currently paying 8.7 percent. What is the investment's expected return? % (Round to two decimal nlaces)