A-4.70 μc charge is moving at a constant speed of 7.00×105 m/s in the +x−direction relative to a reference frame. at the instant when the point charge is at the origin, what is the magnetic-field vector it produces at the following points. part ax=0.500m, y=0, z=0 enter your answers numerically separated by commas. part bx=0, y=0.500m, z=0 enter your answers numerically separated by commas. part cx=0.500m, y=0.500m, z=0 enter your answers numerically separated by commas. part dx=0, y=0, z=0.500m enter your answers numerically separated by commas.