A collimated beam of ions, each with positive charge \( +q \) and mass \( m \), enters the region between two horizontal parallel conducting plates with a range of initial speeds. Inside this region, a uniform electric field \( \vec{E} \) is directed vertically downward and a uniform magnetic field \( \vec{B} \) is directed perpendicularly into the page. Three specific groups of ions within the beam have speeds \( v_1 < \dfrac{E}{B} \), \( v_2 = \dfrac{E}{B} \), and \( v_3 > \dfrac{E}{B} \). Which of the following diagrams best represents the trajectories of these three groups of ions as they pass between the plates?