Anoperator$$issaidtobeassociative$,$if$($A$$B$)$C$=$A$($B$$C$),$forallA,BandCinthedomain under discussion. For instance, addition $(+)$ is associative over the integers, while subtraction $()$ is not. In propositional logic, both $$ and $$ are associative operators. What can you say about the boolean operators $->$ and $,$ as regards associativity?