A bond, denoted as T, is a zero-coupon bond with 11 years until maturity. If the yield to maturity is 10%, the Macaulay duration of this bond is X years, and the modified duration is Y years. Assume annual compounding.
a) X=10. 0,Y=10. 0
b) X=11. 0,Y=10. 0
c) X=10. 0,Y=11. 0
d) X=11. 0,Y=11. 0