For the following sets of quantum numbers, determine which describe actual orbitals and which are nonexistent. For actual orbitals, enter correct. For nonexistent orbitals, give the identity of the quantum number that is impossible, entering n, l, ml (for ml), or ms (for ms).
1) n = 3, l = -1, ml = -1, ms = 1/2
2) n = 3, l = 1, ml = -1, ms = -1/2
3) n = 3, l = 1, ml = 2, ms = 1/2
4) n = 3, l = 2, ml = 2, ms = 1/2