Which of the following elements are at the peaks of the ionization energy trend?

The successive ionisation energy values for an element $X$ are given below. Element $X$ belongs to which group?
$1^{st} \text{ IE} = 410 \ kJ \ mol^{-1}$
$2^{nd} \text{ IE} = 820 \ kJ \ mol^{-1}$
$3^{rd} \text{ IE} = 1100 \ kJ \ mol^{-1}$
$4^{th} \text{ IE} = 1500 \ kJ \ mol^{-1}$
$5^{th} \text{ IE} = 3200 \ kJ \ mol^{-1}$

The first ionisation potentials $(eV)$ of $Be$ and $B$ respectively are :-

Which among the following species has the highest ionisation potential?

The ionization energy of nitrogen is larger than that of oxygen because of

Ionization energy increases in the order