A proton is initially at rest and moves through three different regions as shown in the figure. In region 1, the proton accelerates across a...

A proton is initially at rest and moves through three different regions as shown in the figure. In region 1, the proton accelerates across a potential difference. In region 2, there is a magnetic field pointing out of the page and an electric field pointing perpendicular to the magnetic field and perpendicular to the proton's velocity. Finally, in region 3, there is no electric field, but a magnetic field pointing out of the page