$($Related to Checkpoint $7\mathrm{.}1)($Expected rate of retum and risk$)$ B$.$ J$.$ Gautney Enterprises is evaluating a security. One$-$year Treasury bills are currently paying $4\mathrm{.}7$ percent. Calculate the investment's expected return and its standard deviation. Should Gautney invest in this security?

$\backslash$table$[[$Probability$,$Return$],[0\mathrm{.}10,-4\%$