The real risk-free rate of interest is 5.5%. Inflation is expected to be 5% this coming year, jump to 7% next year, and increase to 9% in year 3. The default risk premium is 3.8% for corporate securities while the liquidity premium is 2.8%. Maturity risk premium is zero for 1-year bonds and increases by 0.25% per year thereafter for up to 10 years. What should be the interest rate on 3-year Corporate securities today? Select one: O a. 12.1% O b. 19.6% c. 12.9% O d. 18.9%