What is the present value of the following? a. A exist450 perpetuity discounted back to the present at 6 percent b. A exist 3, 500 perpetuity discounted back to the present at 10 percent c. A exist100 perpetuity discounted back to the present at 7 percent d. A exist60 perpetuity discounted back to the present at 3 percent a. What is the present value of a exist450 perpetuity discounted back to the present at 6 percent? exist (Round to the nearest cent.)