Kenneth has 2,000$ to invest

The calculations for 2, 4, 8 year can be derived as follows,

For simple interest:

                   S.I =

P= principle

T= Time

R= Rate

For 2 year;

            S.I = =  $224

           Amount = $2224

For 4 year;

            S.I = = $448

           Amount = $2448

For 8 year;

             S.I = = $896

           Amount = $2896

3 is greater then both of those numbers