Using the following information, please calculate the return of an international portfolio. Assume that a portfolio is $65\%$ invested in U$.$S$.$ stock and $35\%$ in Chinese stock $($a $=0\mathrm{.}65).$ Annualized expected returns are $9\%$ and $21\%$ for the US and China stocks, respectively. USA $=13\mathrm{.}5\%$; CHINA $=21\mathrm{.}3\%$; rUSA,CHINA$=0\mathrm{.}25($Correlations$)$