Find the present values of these ondinary 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 8%. b. $300 per year for 6 years at 4%. c. $700 per year for 6 years at 0%. d. Rework previous parts assuming they are annuities due. Present value of $600 per year for 12 years at 8%:$ Present value of $300 per year for 6 years at 4%:$ Present value of $700 per year for 6 years ot 0%:5