Explain, giving reasons, which of the following sets of quantum numbers are not possible. (a) n = 0, l = 0, $m_l$ = 0, $m_s$ = + 1/2 (b) n = 1, l = 0, $m_l$ = 0, ms = – 1/2 (c) n = 1, l = 1, $m_l$ = 0, $m_s$ = + 1/2 (d) n = 2, l = 1, $m_l$ = 0, ms = – 1/2 (e) n = 3, l = 3, $m_l$ = –3, $m_s$ = + 1/2 (f) n = 3, l = 1, $m_l$ = 0, ms = + 1/2