The electrons identified by quantum numbers

The electrons identified by quantum numbers $\mathrm{n}$ and $\ell$ :-

(a) $\mathrm{n}=4, \ell=1$

(b) $\mathrm{n}=4, \ell=0$

(c) $\mathrm{n}=3, \ell=2$

(d) $\mathrm{n}=3, \ell=1$

Can be placed in order of increasing energy as