      0         0         $n=0$              [Ellipse along x-axis]{}            0         0                            [Ellipse along y-axis]{}            0         0                           [Hyperbola along x-axis]{}           0         0         $n=0$              [Ellipse along y-axis]{}            0         0                            [Ellipse along x-axis]{}            0         0                            [Ellipse along y-axis]{}            0         0                            [Ellipse along x-axis]{}            0         0         $n=0$             [Hyperbola along x-axis]{}           0         0                            [Ellipse along y-axis]{}            0         0         $n=0$              [Ellipse along x-axis]{}            0         0                            [Ellipse along y-axis]{}            0         0         $n=0$             [Hyperbola along x-axis]{}           0         0                           [Hyperbola along 