Consider two asset classes: Stocks and Bonds. You estimate the following parameters for these two asset class funds.

correlation matrix b$/$n Stocks and Bonds

E$($r$)$ sd$($r$)$ Stocks Bonds

Stocks $12\%32\%10\mathrm{.}6$

Bonds $6\%7\%0\mathrm{.}61$

Consider a $$70,000$ portfolio consisting of $$30,000$ in Stocks and $$40,000$ in Bonds. So$,$ the portfolio is $42\mathrm{.}86\%$ in Stocks and $57\mathrm{.}14\%$ in Bonds. What is the standard deviation of the return of the portfolio? $($use $2$ decimals in percent, so $10\%$ is $10\mathrm{.}00,$ not $0\mathrm{.}10)$