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?

What is the magnetic force direction experienced by the proton moving in the negative direction?