Question 1 (1 point) Which of the following are sentences of propositional logic. Note, I'm assuming we have atomic letters like p, q, r, s O (p - A q) O-p- OpAq O (pAq) Opv(q>q) O (p>(q>q)) O (pvp) O (-p>q) O-(p>q) Question 2 (1 point) The formal grammar for propositional logic is a regular grammar. O True O False Question 3 (1 point) Which of the following are rules of the grammar of propositional logic? OS -> SoS OS-> (SAS) O S -> -S OS-> (p)