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. $1,000 per year for 12 years at 8%. 5 b. $500 per year for 6 years at 4%. $ c. $800 per year for 12 years at 0% 5 d. Rework previous parts assuming they are annuities due. Present value of $1,000 per year for 12 years at 8%:$ Present value of $500 per year for 6 years at 4% : $ Present value of $800 per year for 12 years at 0%:$