It is found experimentally that the electric field in a certainregion of Earth's atmosphere is directed vertically down. At analtitude of 260 m the field hasmagnitude 60.0 N/C. At an altitude of 190 m, the magnitude is 100 N/C. Find the netamount of charge contained in a cube 70 m on edge, with horizontal faces at altitudesof 190 and 260 m. Neglect the curvature of Earth.