A debt of $31,300 is repaid by payments of $2,830 made at the end of every 6 months. Interest is 11.61% compounded quarterly.

(a) What is the number of payments needed to retire the debt?

(b) What is the cost of the debt for the first 3 years?

(c) What is the interest paid in the sixth payment period?

(d) Construct a partial amortization schedule showing details of the first three payments, the last three payments, and totals.