8. 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. $500 per year for 10 years at 10%. $ b. $250 per year for 5 years at 5%. $ C. $900 per year for 5 years at 0%. $ d. Rework previous parts assuming they are annuities due. Present value of $500 per year for 10 years at 10%: $ Present value of $250 per year for 5 years at 5%:$ Present value of $900 per year for 5 years at 09:$ Grade It Now Save & Continue Continue without saving