calculate the fair present values of the following bonds, all of which pay interest semi annually, have a face value of $1000 have 20 years remaining to maturity and have a required rate of return of 10%

A the bond has a 6% coupon rate

B the bond has an 8% coupon rate

C the bond has a 10% coupon rate

Whats your answers to parts a ABC say about the relation between coupon rates and present values