Two assets have the following expected returns and standard deviations when

the risk$-$free rate is $5\%$:

An investor with a risk aversion of $A=3$ would find that

a risk$-$return basis.

Treasury bills are paying a $4\%$ rate of return. A risk$-$averse investor with a risk

aversion of $A=3$ should invest entirely in a risky portfolio with a standard

deviation of $24\%$ only if the risky portfolio's expected return is at least

$8\mathrm{.}67\%$

$9\mathrm{.}84\%$

$21\mathrm{.}28\%$

$14\mathrm{.}68\%$