Present value of an annuity Find the present values of these ordinary annuities. Discounting occurs once a year. Round your answers to the nearest cent. a. $800 per year for 12 years at 6%. b. $400 per year for 6 years at 3%. C. $900 per year for 12 years at 0%. Rework previous parts assuming that they are annuities due. Round your answers to the nearest cent. d. $800 per year for 12 years at 6%. e. $400 per year for 6 years at 3%. $900 per year for 12 years at 096