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 12%. b. $200 per year for 8 years at 6%. c. $900 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 12%: $ Present value of $200 per year for 8 years at 6%:$ Present value of $900 per year for 8 years at 0%: $