You hold a portfolio of three stocks with the following investments and individual betas. Stock A $20,000 investment has a beta of 1.85. Stock B $30,000 investment has a beta of 0.80. Stock C $15,000 investment has a beta of 0.25. Take out four decimal places and then round for the final answers. a) (4 points) What is the portfolio beta? Show all work. b) (4 points) If the current risk-free rate of return is 3.0% and the return on an average risk security, r(m), is 7%, what is the required rate of return on the portfolio? Show all work