A mortgage for a condominium had a principal balance of $47,300 that had to be amortized over the remaining period of 5 years. The interest rate was fixed at 4.42% compounded semi-annually and payments were made monthly. a. Calculate the size of the payments. b. If the monthly payments were set at $980, by how much would the time period of the mortgage shorten?c. If the monthly payments were set at $980, calculate the size of the final payment.