(a) How many electrons are involved in the oxidation of triphenylphosphine (Ph₃P;) to triphenylphosphine oxide (Ph₃P = O)? Show your reasoning.

(b) Draw a resonance structure for triphenylphosphine oxide in which phosphorus obeys the octet rule.

(c) Draw a Lewis structure for trimethylamine oxide (Me₃NO). How is the bond order of the N—O bond in this compound different from the bond order of the P—O bond in the phosphorus analog, trimethylphosphine oxide? Justify your answer with appropriate resonance structures.