2. Problem 5.15 (Present Value of an Annuity) eBook 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 12 years at 16%. $ b. $150 per year for 6 years at 8%. $ c. $300 per year for 6 years at 0%. $ d. Rework previous parts assuming they are annuities due. Present value of $300 per year for 12 years at 16%: $ Present value of $150 per year for 6 years at 8%: $ Present value of $300 per year for 6 years at 0%: $