In crystals of the salt cesium chloride, cesium ions Cs* form the eight corners of a cube and a chlorine ion Cl is at the cube's center (see the figure). The edge length of the cube is L = 0.35 nm. The Cs ions are each deficient by one electron (and thus each has a charge of te), and the Clion has one excess electron (and thus has a charge of -e). (a) What is the magnitude of the net electrostatic force exerted on the Cl-ion by the eight Cs ions at the corners of the cube? (b) If one of the Cs ions is missing, the crystal is said to have a defect; what is the magnitude of the net electrostatic force exerted on the Cl-ion by the seven remaining Cs ions? Ocr OCs+ (a) Number 0 Units N v (b) Number i 0.0000000038 Units N