Draw a row of 7 boxes. place 3 white checkers in squares 1,2, and 3. place 3 black checkers in squares 5,6 and 7. to move a checker you can either move it to the next square if it is open or you can jump over an adjacent checker into the vacant square directly after it. how can all of the white checkers end up in squares 5,6, and 7 and the black checkers end up in squares 1, 2, and 3?