Please show me the formula that we use to solve these problems.

Which of the following best describes the nominal risk-free interest rate? the sum of the inflation, maturity, default, and liquidity premium the real rate of interest minus the inflation premium the inflation premium plus the real rate equal to the real rate of interest minus the sum of the inflation, mal and liquidity premiums What is the annual interest payment on a bond with a 7% coupon rate par value currently priced at $950? $70.00 $6.65 $7.00 $66.50