a) Suppose the real interest rate is 4% per year, and the expected inflation rate is 6%. What is the nominal interest rate? [Hint: 1 + R = (1 + r)(1 + i), R: nominal interest rate, r: real interest rate, and i: expected inflation rate.] b) Suppose the real interest rate is 3% per year, and the nominal interest rate is 9%. What is the expected future inflation rate?