D2.4. Calculate the total charge within each of the indicated volumes: (a) 0.1 ≤ |x, y, z ≤ 0.2: p, 1 = ;; (b)0 ≤ p ≤ 0.1, 0 ≤ þ≤ л, 2 ≤ z ≤ 4; p₁ = -2r p²z² sin 0.60; (c) universe: p₁ = e−²r /r². Ans. 0; 1.018 mC; 6.28 C