Please, I need it urgently.

An electron and a proton enter the same velocity in a uniform magnetic field oriented vertically upwards. The two particles enter the field in parallel directions, in the same direction, perpendicular to the field lines. We know the mass of the electron me = 9.1 * 10 ^ {- 31}and the mass of the proton mp = 63.1 * 10^{-27} . Draw the trajectories of the particles and calculate the ratio between the radii of these trajectories.