15) You won a portfolio that is 15% invested in Stock X, 40% in stock Y, and 45% in Stock Z. The expected returns on these three stocks are 10%, 19%, and 12%, respectively. What is the expected return on the portfolio? 16) A stock has a beta of 1.25, the expected return on the market is 12%, and the risk-free rate is 3%, what must the expected return on this tock be