9.4 Find the following values assuming a regular, or ordinary, annuity: a. The present value of $400 per year for ten years at 10 percent. b. The future value of $400 per year for ten years at 10 percent. c. The present value of $200 per year for five years at 5 percent. d. The future value of $200 per year for five years at 5 percent.