What is the electronic configuration of $Cu^{2+} (Z = 29)$ in its ground state?

The following sets of quantum numbers represent four electrons in an atom:
$(i)$ $n = 4, l = 1$ $(ii)$ $n = 4, l = 0$
$(iii)$ $n = 3, l = 2$ $(iv)$ $n = 3, l = 1$
The sequence representing the increasing order of energy is:

The electronic configuration $1s^2 2s^2 2p^6 3s^2 3p^6 3d^6$ corresponds to:

The electronic configuration $1s^2, 2s^2 2p^5, 3s^1$ represents:

The magnetic quantum number for a $d$-orbital is ...... .

For a given atomic orbital,$n = 3$. What are the possible values of $l$ and $m_l$?