Zero coupon bonds with face value $100 , redeemable at par, are priced as below:

a)     Bonds redeemable in exactly 1yr are priced at $98

b)     Bonds redeemable in exactly 2yr are priced at $93

c)      Bonds redeemable in exactly 2yr are priced at $89

d)     Bonds redeemable in exactly 2yr are priced at $85.50

Find the yield to maturity of a bond redeemable at 103%of the face value in 4years with annual coupons of 5%