A +6μC point charge is moving at a constant velocity of 8 × 10^6 m/s in the +y direction, relative to a reference frame. At the instant when the point charge is at the origin of this reference frame, what is the magnetic field vector it produces at the following points? (a) x = 0.500 m,y = 0,z = 0, and (b) x=0 , y = −0.500 m, z = 0.