Assume you wish to construct a portfolio by investing $$4000$ in Stock A which has a return of $6\%$ and a standard deviation of $10\%.$ In the portfolio, you will also invest $$6000$ in stock B which has a return of $20\%$ and a standard deviation of $13\%.$ Assuming that the returns on stock A and on stock $B$ have a correlation coefficient of $0\mathrm{.}7,$ what is the portfolio expected return?