excel answers if possible please

1. Countrywide wants to buy your fixed-rate mortgage fram the local savings and loan. The ariginal balance of your mortgage was $300.000 and was obtained 5 years at 7% for 30 years. 10pts (a) What should Countrywide pay if market rates are currently 5% ? 10pts (b) How would your answer change if Countrywide expected the loan to be repaid after five years