What is the present value of the following using excel formula?

a. A $5,000 perpetuity discounted back to the present at 5%

b. A $2,000 perpetuity discounted back to the present at 6%

c. A $15,000 perpetuity discounted back to the present at 8%

d. A $7,000 perpetuity discounted back to the present at 9%

e. A $10,000 perpetuity discounted back to the present at 2%