Use the basic equation for the capital asset pricing model (CAPM?) to work each of the following problems:

1) Find the required return for an asset with a beta of 0.90  when the? risk-free rate and market return are 8% and 12% respectivley

2) Find the ?risk-free rate for a firm with a required return of 15.000% and a beta of 1.25 when the market return is 14%

3) Find the market return for an asset with a required return of 15.996% and a beta of 1.10 when the risk free rate is 9%

4) Find the beta for an asset with a required return of 15.000% when the risk free rate and market return are 10% and 12.5% resepectively