An investor has the following portfolio:
Stock A - $1 million with a beta of 1.25
Stock B - $2 million with a beta of 1.4
Stock C - $1.5 million with a beta of 0.5
Stock D - $0.5 million with a beta of 0.9
What is the beta for this portfolio? What is the required return for the portfolio if the market's required rate of return is 12% and the risk-free rate is 6%?