Three Dimensional Geometry

Let the plane \(\pi\) pass through the point (1, 0, 1) and perpendicular to the planes \(2x + 3y - z = 2\) and \(x - y + 2z = 1\). Let the equation of the plane passing through the point (11, 7, 5) and parallel to the plane \(\pi\) be \(ax + by - z - d = 0\). Then, \({a \over b} + {b \over d} =\)