E6-2 (LOI,2) EXCEL (Simple and Compound Interest Computations) Alan Jackson invests S20,000 at 8% annual interest, leaving the money invested without withdrawing any of the interest for 8 years. At the end of the 8 years, Alan withdraws the accumulated amount of money. Instructions (a) Compute the amount Alan would withdraw assuming the investment earns simple interest. (b) Compute the amount Alan would withdraw assuming the investment earns interest compounded annually (c) Compute the amount Alan would withdraw assuming the investment earns interest compounded semiannually