The equilibrium interest rate should O a. rise when aggregate demand for funds equals aggregate supply of funds. O b. fall when the aggregate demand for funds exceeds aggregate supply of funds. O c. fall when the aggregate supply funds exceeds aggregate demand for funds. O d. rise when the aggregate supply of funds exceeds aggregate demand for funds. One of the following is not correct for federal funds a. Commercial banks are the most active participants O b. None of the options C. Banks lend or borrow short-term fund from each other O d. The rate is normally the same as the T- Bill rate