*answer is not 7.42

Suppose the market is efficient and there is no risk. Five years ago, the market interest rate was 10% and Simpson Warehouses Inc. issued twenty-five-year annual par value coupon bonds. Since then, the interest rates in general have risen. The price today for a Simpson bond is $850.61. If you use a buy-and-hold strategy, what is the expected return (%) on Simpson bonds today