4) - The (current) market expectations are as follows, expected return of Portfolio A: 12%, standard deviation of Portfolio A: 20%, and Risk Free Rate: 4%. It is invested in a portfolio that contains a risk-free asset, and Portfolio A, such that the standard deviation of this portfolio is 10% What will be the expected return on a portfolio that meets this risk tolerance? .. * Note: detail the procedure (by hand), both for the formulas and for the resolution. *