6.1

public void mirrorVerticalLefttoRight()
  {
    Pixel[][] pixels = this.getPixels2D();
    Pixel leftPixel = null;
    Pixel rightPixel = null;
    int width = pixels[0].length;
    for (int row = 0; row < pixels.length/2; row++) // divide by 2 so it only does one side
    {
      for (int col = 0; col < width / 2; col++)
      {
        leftPixel = pixels[row][col];
        rightPixel = pixels[row][width - 1 - col];
        rightPixel.setColor(leftPixel.getColor());
      }
    }
  }