G each time after a player marks a space as either X or O to determined if there's a winner on the board. The method should return one of the GameBoardPlayer members (NONE, X, O, DRAW) to indicate the winner of the board. A player (either X or O) wins if they occupy all spaces in a row, in a column, or diagonal (but if the board is not a square, there's no need to check diagonal). If there's a no winner, and there's no more empty space on the board, this returns DRAW; if there's still empty space, it should return NONE. Hint: in __str__() and get_winner(), you should use only get(row, col) to inspect the values, not <2darray>[row][col]; also use only get_nrows() and get_ncols(). Then you can simply copy these two methods to BitGameBoard and use them there without modifications. This isn't actually the right approach, but is ok and the simplest until we learn inheritance. But if you know how to avoid the copy-and-paste, feel free to do it.