A plane of charge lies in the xz-plane at the origin. Its surface charge density is 8.17 C/m^2. Another charge distribution is present in the vicinity of the plane as well. Just to the right of the origin, the y-component of the electric field due to the plane and the other charge distribution is 520,000 N/C. What is the y-component of the electric field just to the left of the origin? The answer must take into account the direction of the field (left negative, right positive).