O upward O downward (b) Find the coordinates of the vertex. vertex: (U, [D (c) Find the equation of the axis of symmetry. equation of axis of symmetry: [I (d) Find the intercept(s). For both the x- and y-intercept(s), make sure to do the following. . If there is more than one, separate them with commas. . If there are none, select \"None". x-intercept(s): D None Es}