p2 = new CategoryLabelPositions(
            new CategoryLabelPosition(RA_BOTTOM, TextBlockAnchor.TOP_CENTER), 
            new CategoryLabelPosition(RA_BOTTOM, TextBlockAnchor.TOP_CENTER), 
            new CategoryLabelPosition(RA_TOP, TextBlockAnchor.CENTER), 
            new CategoryLabelPosition(RA_TOP, TextBlockAnchor.CENTER)