The X-Men (plus Magneto) are at baseball practice. Storm hits the ball and in the process charges it to 10 C. At the apex of the ball's trajectory (i....

The X-Men (plus Magneto) are at baseball practice. Storm hits the ball and in the process charges it to −10 µC. At the apex of the ball's trajectory (i.e. when the ball only has horizontal velocity - in the +x direction), Magneto uses his magnetic abilities to change the trajectory of the ball. If the ball experiences a downward force, what direction is the magnetic field created by Magneto? List all possible options.