A debt of $36,000 is repaid over 15 years with payments occurring semi-annually. Interest is 6% compounded monthly. (a) What is the size of the periodic payment? (b) What is the outstanding principal after payment 12? (c) What is the interest paid on payment 13? (d) How much principal is repaid in payment 13? (a) The size of the periodic payment is $ (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.) (b) The outstanding principal is $ (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.) (c) The interest paid is (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.) (d) The principal renaid is $