Two protons (charge q= 1.60210-19 C) move at the same speed v=1.4 106 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 mm in the positive y-direction with respect to the one moving in the positive direction.

What is the magnitude of the magnetic field at the point of the proton moving in the negative direction? B= What is the magnetic force direction experienced by the proton moving in the negative direction? FB=