A few years ago, Super Tech Inc. issued a bond that has a face value equal to $1,000 and pays investors $25 interest every six months. The bond is callable in seven years. If you require an 8% rate of return to invest in this bond, what is the yield to call? Use a financial calculator to solve the problem. (Round to two decimal places.) a. $841.55 O b. $890.00 O c. $910.37 O d. $830.20