Can someone please give a quick answer to this problem for me, I have been trying all day to get it correct, but do not understand how.?

Trevor Price bought 10-year bonds issued by Harvest Foods five years ago for $1,003.25. The bonds make semiannual coupon payments at a rate of 8.4 percent. If the current price of the bonds is $1,072.90, what is the yield that Trevor would earn by selling the bonds today? (Round intermediate calculations to 4 decimal places, e.g. 1.2514 and final answer to 2 decimal places, e.g. 15.25%.)

Effective annual yield