Use the expected return-beta equation from the CAPM.

What is the risk-free rate if beta is 1.1, the expected return 6.3% and the expected return for the market portfolio is 6% ? What is beta if the risk-free rate is 2%, the expected return 11% and the expected return for the market is 6% ? What is the expected return for the market if the risk-free rate is 2%, beta 1.4 and the expected return 11%