Suppose that one year later the bond still yields 3.8%. What return has the bondholder earned over the 12-month period?

A government bond matures in 4 years, makes annual coupon payments of 5.8% and
offers a yield of 3.8% annually compounded. Assume face value is $1,000.
a. Suppose that one year later the bond still yields 3.8%. What return has the bondholder
earned over the 12-month period?
b. Now suppose that the bond yields 2.9% at the end of the year. What return did the
bondholder earn in this case?