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 16 years at 8%. $ b. $500 per year for 8 years at 4%. $ C. $1,000 per year for 8 years at 0%. d. Rework previous parts assuming they are annuities due Present value of $1,000 per year for 16 years at 8%: S Present value of $500 per year for 8 years at 4%: $ Present value of $1,000 per year for 8 years at 0%: $