Calculate the value of these bonds: a) 10-year bond, with $1000 principal, a coupon rate 9% and discount rate 12% b) 5-year bond, with $1000 principal, a coupon rate 3.5% and discount rate 5.5% c) 30-year bond, with $1000 principal, a coupon rate of 7.5% and discount rate of 7.5%