A sheet of paper rests on the desk in front of you. An ant walks onto the surface of the paper and tries to walk directly away from you carrying a positively charged crumb. There is a strong magnet under your desk such that across the entire sheet of paper there is a magnetic field pointing straight upwards. In which direction does the ant experience a magnetic force? In other words, is the ant pushed up, down, left, right, forwards, or backwards (relative to you)? Explain.