Use the basic equation for the capital asset pricing model (CAPM) to work each of the following situations.
a. Find the required return for an asset with a beta of 2.2 when the risk-free rate and market return are 5% and 32%, respectively.
b. Find the risk-free rate for a firm with a required return of 23.75% and a beta of 1.25 when the market return is 20%.
c. Find the market return for an asset with a required return of 18% and a beta of 1.2 when the risk-free rate is 8%.
d. Find the beta for an asset with a required return of 15% when the risk-free rate and market return are 3% and 15%, respectively.