7. Calculate the present value of an annuity of $6,000 received quarterly that begins today and continues for 25 years, assuming a discount rate of 10%.

8. Calculate the future value of an ordinary annuity of $250 paid every month for 30 years, assuming an annual earnings rate of 12%.

9. Calculate the future value of a quarterly annuity of $2,000 beginning today and continuing for 10 years, assuming an annual earnings rate of 10%.

10. Calculate the annual payment that can be received over 30 years from a single investment of $1,000,000 earning 9%, compounded annually.

11. Calculate the monthly payment to be received over 15 years from a single investment of $250,000.00 earning 14.4%, compounded monthly.