Two protons (charge q= 1.60210-19 C) move at the same speed v= 1.6 105 m/s in opposite directions parallel to the x-axis. At the instant when they are at the same x-position, the proton moving in the negative direction is at distance r= 0.7 m in the positive y-direction with respect to the one moving in the positive direction. What is the magnetic field direction at the point of the proton moving in the negative direction? +x -x +y -y +z -z What is the magnetic force direction experienced by the proton moving in the negative direction? +x -x +y -y +z -z