Thirteen years ago a firm issued $1,000 par value bonds with a 5% annual coupon rate and a term to maturity of 20 years. Market interest rates have decreased since then and similar bonds today would carry an annual coupon rate of 4%. What would these bonds sell for today if they made (a) annual coupon payments; and (b) semiannual coupon payments?

If the annual coupon bond in #8 above were selling for $1,150, what would be its current yield?