What is the number of unpaired electron(s) in the highest occupied molecular orbital of the following
species $N_2;N_2^{+};O_2;O_2^{+}?$

${\mathrm{N}}_2:{\mathrm{\sigma }}_{1\mathrm{s}}^2<{\mathrm{\sigma }}_{1\mathrm{s}}^{\ast 2}<{\mathrm{\sigma }}_{2\mathrm{s}}^2<{\mathrm{\sigma }}_{2\mathrm{s}}^{\ast 2}<{\mathrm{\pi }}_{2{\mathrm{p}}_{\mathrm{x}}}^2={\mathrm{\pi }}_{2{\mathrm{p}}_{\mathrm{y}}}^2<{\mathrm{\sigma }}_{2{\mathrm{p}}_{\mathrm{z}}}^2\to 0$

$\begin{array}{l}{\mathrm{N}}_2^{+}:{\mathrm{\sigma }}_{1\mathrm{s}}^2<{\mathrm{\sigma }}_{1\mathrm{s}}^{\ast 2}<{\mathrm{\sigma }}_{2\mathrm{s}}^2<{\mathrm{\sigma }}_{2\mathrm{s}}^{\ast 2}<{\mathrm{\pi }}_{2{\mathrm{p}}_{\mathrm{x}}}^2={\mathrm{\pi }}_{2{\mathrm{p}}_{\mathrm{y}}}^2<{\mathrm{\sigma }}_{2{\mathrm{p}}_{\mathrm{z}}}^1\to 1\\ {\mathrm{O}}_2:{\mathrm{\sigma }}_{1\mathrm{s}}^2<{\mathrm{\sigma }}_{1\mathrm{s}}^{\ast 2}<{\mathrm{\sigma }}_{2\mathrm{s}}^2<{\mathrm{\sigma }}_{2\mathrm{s}}^{\ast 2}<\mathrm{\sigma }2{\mathrm{p}}_{\mathrm{z}}^2<{\mathrm{\pi }}_{2{\mathrm{p}}_{\mathrm{x}}}^2={\mathrm{\pi }}_{2{\mathrm{p}}_{\mathrm{y}}}^2<{\mathrm{\pi }}_{2{\mathrm{p}}_{\mathrm{x}}}^{\ast 1}={\mathrm{\pi }}_{2{\mathrm{p}}_{\mathrm{y}}}^{{\ast }_1}\to 2\\ {\mathrm{O}}_2^{+}:{\mathrm{\sigma }}_{1\mathrm{s}}^2<{\mathrm{\sigma }}_{1\mathrm{s}}^{\ast 2}<{\mathrm{\sigma }}_{2\mathrm{s}}^2<{\mathrm{\sigma }}_{2\mathrm{s}}^{\ast 2}<\mathrm{\sigma }2{\mathrm{p}}_{\mathrm{z}}^2<{\mathrm{\pi }}_{2{\mathrm{p}}_{\mathrm{x}}}^2={\mathrm{\pi }}_{2{\mathrm{p}}_{\mathrm{y}}}^2<{\mathrm{\pi }}_{2{\mathrm{p}}_{\mathrm{x}}}^{\ast 1}={\mathrm{\pi }}_{2{\mathrm{p}}_{\mathrm{y}}}^{\ast }\to 1\end{array}$