Two$-$Asset Portfolio Stock A has an expected return of $12\%$ and a standard deviation of $40\%.$ Stock B has an expected return of $18\%$ and a standard deviation of $60\%.$ The correlation coefficient between Stocks A and B is $0\mathrm{.}2.$ What is the expected return and standard deviation of a portfolio invested $30\%$ in Stock A and $70\%$ in Stock B$?$