Suppose you bought a 20-year annuity of $7,000 per year at the current discount rate of 10 percent per year.

a.	What is the value of your annuity today? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.)
b.	What is the present value if interest rates suddenly drop to 5 percent? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.)
c.	What is the present value if interest rates suddenly rise to 15 percent? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.)