8) Your financial portfolio is comprised of the following three stocks for which your $ investment, their betas and returns are given: Stock A Stock B Stock C Investment Value $4,000 $5,000 $1,000 Beta 0.5 1.2 1.5 Return 5.5% 9% 10.5% a) What is the beta of your portfolio? b) If the risk-free rate of return is 3% and the market portfolio return is 8%, what is your portfolio return