Which of the following are valid equivalences?

Multiple select question.

p $$ q $$p $->$ q

p $$ q $$ p $$q

p $$ q $$p $$q

$($p $->$ q$)($p $->$ r$)$ p $->($q $$ r$)$

$($p $->$ q$)($p $->$ r$)$ p $->($q $$ r$)$

p $->$ q $$ p $$q