Rank the magnitudes of the forces exerted on the following particles from largest to smallest:
1. A proton moving at 1 Mm/s parallel to a 1-mT magnetic field.
2. A proton moving at 2 Mm/s perpendicular to a 1-mT magnetic field.
3. A proton moving at 1 Mm/s perpendicular to a 1-mT magnetic field.
4. A proton moving at 1 Mm/s 30 degrees counterclockwise to a 1-mT magnetic field.