7. (10pts)Use the following electrostatic force, F, diagram in (a) and interatomie potential energy, E, diagram in (b) to explain the following: a. Modulus of elasticity of metals: b. The anisotropy of elastic moduli of single crystal Chromium in the 111 and 1100 directions. Full attractive Fm B resultant ro separation repulsive (a) Frept E +ve magnitude = area shaded on force curve ro separation (b) Epo -Ve