Stock A has an expected return of $10\%,$ and Stock B has an expected return of $15\%.$ The beta of stock A is $1\mathrm{.}2.$

What is the expected return of a portfolio invested $40\%$ in stock A and $60\%$ in stock B$?$

If you want the overall portfolio indicated in the previous question to be as risky as the market, what is the beta of stock B$?$