g. To find the total field you have to sum over all do's corresponding to each increment of length dx'. Summing of infinitesimals is called integration. Set up the integral over the length of the line of charge, including correct limits and integration variables. (Do not actually solve the integral.). y P(0, y, 0) dx'- x'- P'(x', 0, 0) X - L/2 L/2 O (Here is the result of your integral if you set it up correctly. E = - (Eq. 21g).) 4TEOy ( v2 + ( )