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