Which tiles should be added to the model below to make zero?O6 negative tilesO6 positive tilesO3 negative tiles and 3 positive tilesO6 negative tiles and 6 positive tiles

Which tiles should be added to the model below to make zeroO6 negative tilesO6 positive tilesO3 negative tiles and 3 positive tilesO6 negative tiles and 6 posit class=