(Perpetuities) What is the present value of the following? a. A$750 perpetuity discounted back to the present at 15 percent b. A$1,000 perpetuity discounted back to the present at 19 percent c. A $230 perpetuity discounted back to the present at 16 percent d. A$75 perpetuity discounted back to the present at 12 percent a. What is the present value of a $750 perpetuity discounted back to the present at 15 percent? $ (Round to the nearest cent.) b. What is the present value of a $1,000 perpetuity discounted back to the present at 19 percent? $ (Round to the nearest cent.) c. What is the present value of a $230 perpetuity discounted back to the present at 16 percent? $ (Round to the nearest cent.)