Find the future values of these ordinary annuities. Compounding occurs once a year. Do not round intermediate calculations. Round your answers to the nearest cent. a. $400 per year for 12 years at 6%. $ b. $200 per year for 6 years at 3%. $ c. $600 per year for 6 years at 0%. d. Rework parts a, b, and c assuming they are annuities due. Future value of $400 per year for 12 years at 6%: $ Future value of $200 per year for 6 years at 3%: $ Future value of $600 per year for 6 years at 0%:$