问题如下：
An. investor expects the current 1-year rate for a zero-coupon bond to remain at 6%, the 1-year rate next year to be 8%, and the 1-year rate in two years to be l0%. What is the 3-year spot rate for a zero-coupon bond with a face value of $1, assuming all investors have the same expectations of future 1-year rates for zero-coupon bonds?
选项：
A. 7.888%.
B. 7.988%.
C. 8.000%.
D. 8.088%.
解释：
The 3-year spot rate can be solved for using the following equation:
Solving for
请问用这种方法
做对吗？
