A 7-year government bond makes annual coupon payments of 4.8% and offers a yield of 2.8% annually compounded. Assume face value is $1,000. Note: Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places. a. Suppose that one year later the bond still yields 2.8%. What return has the bondholder earned over the 12 -month period? b. Now suppose that the bond yields 1.8% at the end of the year. What return did the bondholder earn in this case