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. $400 per year for 16 years at 6%. b. $200 per year for 8 years at 3%. 5 c. $300 per year for 8 years at 0%. 5 d. Rework previous parts assuming they are annuties due. Present value of $400 per year for 16 years at 6%:$ Present value of $200 per year for 8 years at 3%:$ Present value of $300 per year for 8 years at 0%:$