Problem $4.$ I have a diatomic, ionically bonded material having attractive and repulsive energies as a function of interatomic separation distance of

$E_A=\frac{-2\mathrm{.}34}{r},E_R=\frac{6\mathrm{.}9{10}^{-5}}{r^9}$

Where $E_A$ and $E_R$ are in units of electron volts $(eV)$ and interatomic spacing, r $,$ is in units of nanometers $($ nm $).$ Recall that the total energy of a bond is just the sum of the attractive and repulsive forces and that minimization of total $($net$)$ energy indicates the actual spacing of the two atoms at rest $($without application of any external stimulus$).$

a$)$ Create a plot showing $E_A,E_n,$ and $E_{\text{r}\text{e}\text{t}\text{a}\text{l}}$ as a function of interatomic spacing for the molecule.

NOTE: I recommend plotting your solution, roughly, on the range;