Calculate the required rate of return for the SongYoon Management Group, which holds 4 stocks. The market's required rate of return is 15.0%, the risk-free rate is 7.0%, and the Fund's assets are as follows: 11.95% O 13.10% O 12.80% O 6.52% Calculate the required rate of return for the SongYoon Management Group, which holds 4 stocks. The market's required rate of return is 15.0%, the risk-free rate is 7.0%, and the Fund's assets are as follows: 11.95% O 13.10% O 12.80% O 6.52%