Is there a way to do this using the hp12c or by hand?

Please show work

Thank you!

73 You have just invested in a portfolio of three stocks. The amount of money that you invested in each stock and its beta are summarized below. Calculate the beta of the portfolio and use the Capital Asset Pricing Model (CAPM) to compute the expect rate of return for the portfolio. Assume that the expected rate of return on the market is 15 percent and that the risk percent. -free rate is 7 Stock Investment Beta $200,000 150 00,000 0.65 500,000 1.25