Find the present value of the following ordinary annuities: using the TVM CALCULATOR find a. FV of $400 each six month for five years at a simple rate of 12%, compounded semiannually. b. FV OF$200 each three months for five years at a simple rate of 12 percent, compounded quarterly c. the annuity in part b earns $31.46 more than the one in part a over the five years. why does this occurs?