What is the expected return on a portfolio which consists of $4,000 invested in an S&P 500 Index fund, $4,000 in a technology fund, and $2,000 in Treasury Bills. The expected rate of return is 11% on the S&P Index fund, 14% on the technology fund and 2% on the Treasury Bills. O 11.25% 9.84% None of them O 10.40% 0 9.50%