A company issued bonds 8 years ago with original maturity of 25 years, 7.5% coupon rate with semiannual coupon payments, and a par value of $1,000. The current market interest rate is 11.75%. What is the bond's price?

a. $718.52

b. $690.22

c. $780.75

d. $890.46

e. $814.97​