Find the present values of these ordinary annuities, Discounting occurs once a year. Do not round intermediate calculations. Round your answers to the nearest cent. a. $400 per year for 16 years at 16%. b. $200 per year for 8 years at 8%. c. $500 per year for 8 years at 0%. $ d. Rework previous parts assuming they are annuities due. Present value of $400 per year for 16 years at 16%: $ Present value of $200 per year for 8 years at 8%: $ Present value of $500 per year for 8 years at 0%:s