a. $800 per year for 14 years at 8%. $ b. $400 per year for 7 years at 4%. $ c. $300 per year for 7 years at 0%. $ d. Rework previous parts assuming they are annuities due. Present value of $800 per year for 14 years at 8%:$ Present value of $400 per year for 7 years at 4% : $ Present value of $300 per year for 7 years at 0\%: $