If the real interest rate is 2% and expected inflation is 15%, what is the approximate nominal interest rate?

If the par value of a 3% semi-annual coupon bond is 500,000 yen, what is the payment received every six months?

Bond A has an annual coupon of 6% and bond B has an annual coupon of 9%. Both have 7 years until maturity. The market demanded interest rates for these bonds moves from 4.5% to 5.5%. What is the price of bond B after the interest rate change?