Q1.A portfolio is invested 20% in Stock A, 27% in Stock B, and the remainder in Stock C. The returns for Stock A, B, and C are 13.6%, 30.6%, and 13.9% respectively. What is the portfolio's return?

Q2.you own a portfolio invested 13.72% in Stock A, 18.04% in Stock B, 24.63% in Stock C, and the remainder in Stock D. The beta of these four stocks are 0.66, 1.07, 1.57, and 0.67. What is the portfolio beta?