In this GeoGebra Augmented Reality modeling challenge, the goal is to construct 4 spheres [b]by authoring only 2 surface equations. [br][br]Modeling Clues:[/b][br][br]1) The center of each sphere is located [math]\frac{3\sqrt{2}}{2}[/math] units away from (0,0,0).[br][br]2) The x-axis and y-axis are tangent to all 4 spheres.