$200 per year for 10 years at 6%. $ $100 per year for 5 years at 3%. $ $200 per year for 5 years at 0%. $ Now rework parts a, b, and c assuming that payments are made at the beginning of each year; that is, they are annuities due. Present value of $200 per year for 10 years at 6%: $ Present value of $100 per year for 5 years at 3%: $ Present value of $200 per year for 5 years at 0%: $