A 20-year bond with a face value of $1,000 and a coupon rate of 10% per year, interests are paid semiannually. With exactly 15 years to maturity, the market rate is 8% per year at that moment for bonds with the same rating and maturity, what is this bond's price at that time? a. 1,000.00 b. 893.24 C. 1,042.30 d. 1,172.92