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.

1. $900 per year for 10 years at 16%.

   $

2. $450 per year for 5 years at 8%.

   $

3. $600 per year for 5 years at 0%.

   $

4. Rework previous parts assuming they are annuities due.

   Present value of $900 per year for 10 years at 16%: $

   Present value of $450 per year for 5 years at 8%: $

   Present value of $600 per year for 5 years at 0%: $