6. By looking at the yields of Treasury bill, notes, and bonds, was the yield curve upward sloping downward sloping, or flat at the beginning of the semester and how did the yield curve change over the semester? Explain changes in expectations about future interest rates that are implied in the change in the yield curve over the semester. 6. By looking at the yields of Treasury bill, notes, and bonds, was the yield curve upward sloping downward sloping, or flat at the beginning of the semester and how did the yield curve change over the semester? Explain changes in expectations about future interest rates that are implied in the change in the yield curve over the semester