Consider a closed triangular box resting within a horizontal electric field of magnitude E = 7.40x10^4 N/C, as shown in the figure below.
a) Calculate the electric flux through the vertical rectangular surface of the box. kN·m2/C
b) Calculate the electric flux through the slanted surface of the box. kN·m2/C
c) Calculate the electric flux through the entire surface of the box. kN·m2/C