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 14 years at 6%. b. $150 per year for 7 years at 3%. $ C. $300 per year for 7 years at 0%. $ d. Rework previous parts assuming they are annuities due. Present value of $300 per year for 14 years at 6%: $ Present value of $150 per year for 7 years at 3%: $ Present value of $300 per year for 7 years at 0%: $