In solid (crystalline) argon, each argon atom has 12 nearest neighbours at an equilibrium distance rₑᵩ. Assume that argon atoms in the solid are bound to each nearest neighbour by a Lennard-Jones potential, V(r)=Eₘᵢₙ ​[(rₑᵩ/r)¹² −2(rₑᵩ/r)⁶] You can also assume that in the gas phase there is no interaction between argon atoms. (a) Sketch the potential and indicate rₑᵩ and Eₘᵢₙ.