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. $600 per year for 12 years at 12%. $ b. $300 per year for 6 years at 6%. $ c. $400 per year for 6 years at 0%. $ d. Rework parts a, b, and c assuming they are annuities due. Future value of $600 per year for 12 years at 12% : $ Future value of $300 per year for 6 years at 6% : $ Future value of $400 per year for 6 years at 0%:$