Bounds on returns consider a universe of just three securities. they have expected rates of return 10%, 20%, and 10%, respectively. two portfolios are known to lie on the minimum-variance set. Two portfolios are known to lie on the minimum-variance set They are defined by the portfolio weights w= 60, 20, 20 v= 80, -20, 40 It is also known that the market portfolio is efficientGiven this information, what are the minimum and maximum possible values for the expected rate of return on the market portfolio?