1. For the following 4 statements, please (i) use the logical equivalences p q p q and p q (pq)(qp) to rewrite them without using the symbol or ; and (ii) use the logical equivalence p q (p q) to rewrite each statement form using only and .

(a) p q r

(b) p q r q

(c) (p r) (q r)

(d) (p (q r)) ((p q) r)