14. If the nominal interest rate is 6% and the inflation rate is 3% then the real interest rate is: a. 2.8% b. 3% vs. 4.5% d. 5% e. 6% 15. If the real interest rate is 4%, the inflation rate 6% and the tax rate 20%, then the real interest rate after tax is: a. 1% b. 2% vs. 3% d. 4% e. 5%