Halogenation of alkanes gives a mixture of monohalo products. What will be the order of the ease of substitution?

Electrophile $\stackrel{\oplus }{\mathrm{N}}{\mathrm{O}}_2$ attacks the following :

In which cases $\stackrel{\oplus }{\mathrm{N}}{\mathrm{O}}_2$ will attack at meta position?

The geometry of the compound is:-

${\mathrm{CH}}_2=\mathrm{CH}-\mathrm{CH}={\mathrm{CH}}_2$

Substitution takes place at the position.