answer part a, b and c using formula method

A mortgage for a condominium had a principal balance of $41,700 that had to be amortized over the remaining period of 8 years. The interest rate was fixed at 3.72% compounded semi-annually and payments were made monthly. a. Calculate the size of the payments, rounded up to the next whole number. O $503 $936 $498 $507 b. If the monthly payments were set at $603, by how much would the time period of the mortgage shorten? 1 years and 6 months O 2 years and 7 months O 9 years and 0 months 9 years and 1 months c. If the monthly payments were set at $603, calculate the size of the final payment. 0 $1,128.32 0 $76.30 O $526.93 O $72,094.26