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 4%. $ b. $150 per year for 7 years at 2%. $ c. $900 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 4%: $ Present value of $150 per year for 7 years at 2%:$ Present value of $900 per year for 7 years at 0%: $