A 5.40% coupon treasury bond was issued on September 10, 2012 and matures on September 8, 2022. The settle date is March 26, 2016. The call date is December 20, 2017 and the call price is $110. If the current price is $100, what is the current annual yield to call?

6.67%, this could be the answer but

5.39%

10.78%

7.00%, this also seems to be the answer as well, need help solving this.