1. In the first conversation, the Quality maxim is being flouted.
2. In the second conversation, the Quantity maxim is being flouted.
3. In the third conversation, the Relevance maxim is being flouted.
4. In the fourth conversation, the Manner maxim of avoiding ambiguity is being flouted.
2. Yes, the implicatures are successful in each case because the hearer recognizes that a maxim is being flouted and is able to infer the implicated meaning.