6. DETAILS MY NOTES Consider a closed triangular box resting within a horizontal electric field of magnitude E = 6.68 x 104 N/C as shown in the figure below. 30.0 cm 10.0 cm 60.00 (a) Calculate the electric flux through the vertical rectangular surface of the box kNm2/C (b) Calculate the electric flux through the slanted surface of the box. kNm2/C (c) Calculate the electric flux through the entire surface of the box. KN.my