In an inertial frame, uniform electric and magnetic fields \(\rm\overrightarrow{E}\) and \(\rm\overrightarrow{B}\) are perpendicular to each other and satisfy \(|\rm\overrightarrow{E}|^2−|\rm\overrightarrow{B}|^2\) = 29 (in suitable units). In another inertial frame. which moves at a constant velocity with respect to the first frame, the magnetic field is 2√5k̂. In the second frame, an electric field consistent with the previous observations is