15. 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. $1,000 per year for 12 years at 6%. $ b. $500 per year for 6 years at 3%. $ 5 C. $700 per year for 6 years at 0% $ d. Rework previous parts assuming they are annuities due Present value of $1,000 per year for 12 years at 6%:$ Present value of $500 per year for 6 years at 39: 5 Present value of $700 per year for 6 years at 09:5