The magnetic force is given by FM = I*B, where I is the charge multiplied by the velocity of the charged particle.
I = 4.0*10^6*1.6*10^-19
The magnetic field is equal to 0.2 Tesla directed in a direction into the screen
The magnitude of the magnetic force is 4.0*10^6*1.6*10^-19*0.2
The formula for the magnetic field is given as a dot product, FM = I*B. There is no information provided about the interaction between the velocity and the direction of the magnetic field that would determine the direction of the magnetic force. So we can take the the direction of the magnetic field would be the same as that of velocity.
The magnitude of the magnetic force is 1.28*10^-13 and its direction is in the horizontal direction towards the right.