A 6.0 percent coupon bond with 25 years left to maturity can be called in four years. The call premium is one year of coupon payments. It is offered for sale at $1,066. What is the yield to call of the bond? (Assume that interest payments are paid annually and par value is $1,000.) 5.66 percent 5.63 percent 5.50 percent 5.43 percent