Azimuthal and Magnetic Quantum Numbers — Prelims Questions

Which of the following sets of quantum numbers is NOT permissible for an electron in an atom?

What is the maximum number of electrons that can be accommodated in a subshell for which $l=3$?

For an electron in a 4d orbital, what are the possible values of the Azimuthal ($l$) and Magnetic ($m_l$) Quantum Numbers?

What is the total number of orbitals in the third main energy shell ($n=3$)?

An electron has an orbital angular momentum of $sqrt{6}hbar$. What type of subshell is this electron in?

How many orbitals are possible for an electron with $n=3$ and $m_l=0$?