Your portfolio comprises four investments, with an equal dollar value invested in each. The four investments are 1) the S&P 500 market portfolio, 2) shares of Tesla stock, 3) a General Motors bond, and 4) cash in a bank savings account which pays a guaranteed 0.50% interest this year. The CAPM betas for Tesla stock and the GM bond are 1.97 and 0.60, respectively. What is the beta of your entire portfolio?