1. The problem statement, all variables and given/known data The electric field equals 19j for points above plane 'r', -31j between the planes, and -19j below plane 's', where j is the unit vector in the +y direction and the fields are in V/m. Calculate σr, the suface charge density for plane 'r'. positive y- straight up positive x-to the right. 2. Relevant equations E=Qenc/Epsilon0 3. The attempt at a solution i tried adding the 19j + -31j then multiplying that by Epsilon 0. that didnt work. not sure how to add or apply the electric fields. any pointers on how to solve that?