Find the present value and the compound discount of (a) $3600 due in 9 years if interest is 8% compounded semi-annually; (b) $9000 due in 5 years if money is worth 6.8% compounded quarterly. (a) The present value is $0. (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.) The compound discount is (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.) (b) The present value is $ (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.) The compound discount is $0. (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.)