Physics help! what is the gravitational, electric, and magnetic forces?

At the Equator, near the surface of the Earth, the magnitude field is approximately 50.0 μT northward and the electric field is about 100 N/C downward in fair weather. Find the gravitational, electric, and magnetic forces on an electron in this environment, uming that the electron has an instantaneous velocity of 8 e6 m/s directed to the east.