Suppose that the federal debt in 2020 is $14 trillion. If interest rates remain at the 2016 level of 24%, find the annual interest payment on the debt. How much does the interest payment change with a 0.4-point Increase in the interest rate? The interest payment increased from $bilion to sillon Round to the newest whole number as eeded) The Wrest rato Increason by about and the interest payment increases by about %. (Round to the newest whole rumber as needed.)