Find the present values of these ordinary annuities. Discounting occurs once a year. Round your answers to the nearest cent. $500 per year for 12 years at 16%. $ $250 per year for 6 years at 8%. $ $300 per year for 12 years at 0%. $ Rework previous parts assuming that they are annuities due. Round your answers to the nearest cent. $500 per year for 12 years at 16%. $ $250 per year for 6 years at 8%. $ $300 per year for 12 years at 0%. $