The following information applies to the next $3$ questions:

Your retirement fund offers you only $3$ assets: a risky bond mutual fund, a risky stock mutual fund, and a risk$-$free asset. The following table provides the expected return, standard deviation, and correlation matrix for the two risky assets and the risk$-$free asset $($e$.$g$,$ the correlation between $B$ and $S$ is $0\mathrm{.}15)$:

$\backslash$table$[[,,,,$Correlation Matrix ${}_{ij}$