James McCulloch purchased a 30-year US Treasury bond four years ago for $8.000. The bond paid 3.475 percent annual interest. Four years later he sold the bond for $8,075. (a) What is the annual interest amount for the bond? (Round your answer to 2 decimal places.) Annual interest (b) What is the total interest Mr. McCulloch earned during the four-year period? (Round your answer to the nearest whole doller.) Total interest (c) What is the total return for Mr McCulloch's bond investment? (Round your answer to the nearest whole dollar.) Total return