For a three year bond of $2,800 at a simple interest rate of 9% per year, find the semiannual interest payment and the total interest earned over the life of the bond. The semiannual interest on the bond is $ (Simplify your answer. Type an integer or a decimal. Round to the nearest cent as needed.) For a one year bond of $2,100 at a simple interest rate of 10% per year, find the semiannual interest payment and the total interest earned over the life of the bond. The semiannual interest on the bond is $ (Simplify your answer. Type an integer or a decimal. Round to the nearest cent as needed.)