using the capital asset pricing model?

1. find the required return for an asset with beta of 2.2 when the risk free rate 5% while market return is 32%?

2. what is the risk free rate for the firm with a required return of 23.75&, and a beta of 1.25, when the market return is 20%?

3. find the market return for an asset with a required return of 18% and beta of 1.20 when the risk free rate is 8%?

4. find the beta for asset with a required return of 15% when the risk free rate is 3% and market return 15%?