This hw is due at 12 and I'm having trouble with this question could you help please

An investor inherited $80,000, and she split it into three investments. Part of the money she invested in a treasury bill that yields 3% annual interest, part she invested in bonds with an annual yield of 8%, and the rest she invested in a mutual fund. In 2008, when the mutual fund lost 7%, her net income from all three investments was $2400. In 2009, when the mutual fund gained 10%, her net income from all three investments was $5800. How much money did the investor put into each investment? The investor invested $ in the treasury bill, $ in bonds, and $ in the mutual fund