An investor purchased a 30-year Treasury bond with a 6% semi-annual coupon ten years egg, when the bond was traded at par value. In 10 years' time, the bond's yield to maturity has risen to 7% (APR). a. b. If the investor sells the bond now, what internal rate of return (expressed in APR) will the investor earn on his investment in the bond? [Hints: use excel built-in function RATES() ] If instead this investor holds the bond to maturity, what internal rate of return will the investor earn on his investment in the bond?