Here is a box on whose surfaces the electric field is measured to be horizontal and to the right. On the left face (3cm by 2cm) the magnitude of the elecric field is 400 N/C, and on the right face the magnitude of the electric field is 1200 N/C.
a) Calculate the electric flux through every face of the box.
b) Calculate the total flux through the box.
c) Calculate the total amount of charge that is inside the box.