Bank of Montreal issued a loan of $72,000 at 7.15% compounded semi-annually. The loan was repaid by payments of $980 at the end of every month. a. How many payments were required to pay off the loan? (Enter a whole number) b. What was the total principal repaid in the 2 nd year? (Enter starting and ending periods as P1 and P2 and the total principal repaid as a positive value to the nearest cent.) P1=P2= Total principal repaid in the 2nd year =$ c. What was the size of the final payment? (Enter a positive value to the nearest cent)