Draw Lewis structures of the ions or molecules whose formulas are given in the answer choices below. Determine whether each of these species follows the octet rule, is octet deficient (central atom works with less than eight electrons in its valence shell), or has an expanded octet (central atom works with more than eight electrons in its valence shell). Pick the choice which is correct. a) The central atom in N2 has an expanded octet. b) The central atom in XeF4 has an expanded octet. c) The central atom in BeH2 has an expanded octet. d) The central atom in BF3 follows the octet rule. e) The central atom in SF4 follows the octet rule.