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. $300 per year for 16 years at 16%. $ b. $150 per year for 8 years at 8%. $ c. $900 per year for 8 years at 0%. $ d. Rework previous parts assuming they are annuities due. Present value of $300 per year for 16 years at 16% : $ Present value of $150 per year for 8 years at 8%:$ Present value of $900 per year for 8 years at 0% : $