In each case, small charged particles are fixed on grids having the same spacing. Each charge $\backslash ($ q $\backslash )$ is an identical positive charge, and all other charges have a magnitude that is an integer multiple of $\backslash ($ Q $\backslash ).$

Rank the electric potential energy of these charge arrangements.

OR

Greatest

$2$

$3$

$4$

$\backslash (\backslash$stackrel$\{5\}\{\backslash$text $\{$ Least $\}\}\backslash )$

All

All

Cannot determine

Explain your reasoning.