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. $600 per year for 12 years at 6%. 5 b. $300 per year for 6 years at 3%. 5. c. $400 per year for 6 years at 0%. 5. d. Rework previous parts assuming they are annuities due. Present value of $600 per year for 12 years at 6%:$ Present value of $300 per year for 6 years at 3%:3 Present value of $400 per year for 6 years at 0%4:$