The interest rate on a $60,000 loan is 9.1% compounded semiannually. Quarterly payments will pay off the loan in fifteen years. (Do not round intermediate calculations and round your final answers to 2 decimal places.) a. Calculate the interest component of Payment 13. Interest $ b. Calculate the principal component of Payment 52. Principal $ c. Calculate the total interest in Payments 39 to 50 inclusive. Total interest d. Calculate the reduction of principal in Year 4. Principal reduction $