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. $300 per year for 10 years at 8%. $ b. $150 per year for 5 years at 4%. $ c. $400 per year for 5 years at 0%. $ d. Rework previous parts assuming they are annuities due. Present value of $300 per year for 10 years at 8%: $ Present value of $150 per year for 5 years at 4%:$ Present value of $400 per year for 5 years at 0%:$