please help

Your portfolio has three asset classes. Us government T-billis account for 47% of the portfolio, large-company stocks constitute another 31%, and small-company stocks make up the remaining 22%. If the expected returns are 558% for the T-bills, 15.14% for the large-company stocks, and 19.85% for the small-company stocks, what is the expected return of the portfolio? The expected return of the portfolio is 0% (Round to two decimal places.)