How many years will the following take? a. $500 to grow to $1,039.50 if invested at 5 percent compounded annually b. $35 to grow to $53.87 if invested at 9 percent compounded annually c. $100 to grow to $298.60 if invested at 20 percent compounded annually d. $53 to grow to $78.76 if invested at 2 percent compounded annually