D3.4. Calculate the total electric flux leaving the cubical surface formed by the six planes x, y, z= ±5 if the charge distribution is: (a) two point charges, 0.1 μC at (1, -2, 3) and μC at (-1, 2, -2); (b) a uniform line charge of л μC/m at x=-2, y = 3; (c) a uniform surface charge of 0.1 uC/m² on the plane y = 3x. Ans. 0.243 μC; 31.4 μC; 10.54 μC