Find the present values of these ordinary annufties. Discounting occurs once a yoar. Do not round intermediate calculations. Round your answers to the nearest cent: a. $1,000 per year for 16 vears at 8%. b. $500 per year for 8 years ot 4%. c. $700 per year for 8 years at 0%. 5 d. Rework previous parts assuming they are annuties due. Present vatue of $1,000 per year for 16 years at 8%:$ Present value of $500 per year for 8 years at 4%:$ Present value of 5700 per year for 8 years at 0%:5