Compute the following: (a) The present value of $25,000 each year for 4 years at a 7

Question:

Compute the following:
(a) The present value of $25,000 each year for 4 years at a 7 percent interest rate.
(b) The present value of $152,000 each year for 5 years at a 6 percent interest rate.
(c) The present value of $60,000 each year for 10 years at a 6.5 percent interest rate.