You manage a risky portfolio with an expected rate of return of $19\%$ and a standard deviation of $31\%.$ The T$-$bill rate is $5\%.$ Your client chooses to invest $60\%$ of a portfolio in your fund and $40\%$ in a T$-$bill money market fund.

Suppose that your risky portfolio includes the following investments in the given proportions:

$\backslash$table$[[$Stock A$,25\%$