Quadrilateral M A T H has vertices M equals the point 1 comma 3, A equals the point negative 4 comma 6, T equals the point negative 2 comma 7, and H equals the point 5 comma 9. Quadrilateral M prime A prime T prime H prime is the image after dilating M A T H by a scale factor of 3 about the origin. What are the coordinates of A prime ?