What is the present worth of these future payments? Provide Calculations.

1. $5,300 6 years from now at 7% compounded annually.
2. $7,800 15 years from now at 8% compounded annually.
3. $20,000 5 years from now at 9% compounded annually.
4. $12,000 10 years from now at 10% compounded annually.