An retiree has decided to create a portfolio that contains the Vanguard S\&P 500 index fond, an agzressive growth mutual fund, and government Treasury bills. The S\&P $00 Index fund is identical in riak to the market portfolio, while the aggreseive growth mutual fand has a beta of 150 . The retiree has decided on the following plan: Currently, investors are eaming a 15% return on the Treasury bilts. The retiree is not sare aboet the expected retarn on the Vanguard fand, but he does inow that the market portfolio rixk premium is 6.00%. What is the expectied valoe of this portfolio in one year if we ase the required return? $538,500 $542,000 $543,500 $531,000 $539,500 Internet connection lost. No longer saving answ