A region of space has an electric field of 905 N/C in the +x direction, and a magnetic field of 1.60 T in the +z direction. If a 2.75 uC charged particle moving in the x-y plane experiences a net force of 4.35 * 10^-3 N in the +x direction, what is the speed and direction of the charged particle? What would the force on the particle be if its motion was toward the origin along the z-axis?