Consider the following information and then calculate the required rate of return for the portfolio which holds 4 stocks. The market's required rate of return is 12%, the risk-free rate is 6.00%, and the portfolio's assets are as follows: Stock Investment Beta A $ 1,000,000 1.20 B $ 500,000 0.75 C $ 1,000,000 1.00 D $1,500,000