${\mathrm{N}}_2$ and ${\mathrm{O}}_2$ are converted to monopositive cations ${\mathrm{N}}_2^{+}$ and ${\mathrm{O}}_2^{+}$ respectively. Which set is having correct statements?
$1.$ In ${\mathrm{O}}_2^{+}$ , paramagnetism decreases
$2.$ ${\mathrm{N}}_2^{+}$ becomes diamagnetic
$3.$ In ${\mathrm{O}}_2^{+}$ , the bond order increases
$4.$ In ${\mathrm{N}}_2^{+}$ the $\mathrm{N}-\mathrm{N}$ bond is weakened.