The Treasury bill rate is 6.50% and the expected return on the market is 14.20%. Consider an investor who owns three assets: asset 1, asset 2, and asset 3. He invests 30%, 45%, and 25%, respectively, of his portfolio value in the three assets. The beta values for the three assets are -0.4, 0.5, and -0.72, respectively. What is the required return on the portfolio according to the CAPM