12. A positively-charged particle (+q) is at rest in the plane between two fixed bar magnets, as shown. The magnet on the left is three times as strong as the magnet on the right. Which choice below best represents the resultant MAGNETIC force exerted by the magnets on the charge?
13. Three charges are shown below and are labeled A, B, and C. Which of the arrows is in the direction of the net force on charge B?