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 14 years at 6%. $ b. $200 per year for 7 years at 3%. $ c. $400 per year for 7 years at 0%. $ d. Rework previous parts assuming they are annuities due. Present value of $400 per year for 14 years at 6% : $ Present value of $200 per year for 7 years at 3% : $ Present value of $400 per year for 7 years at 0%:$