Which of the following is/are not one of the reasons why no refunds signs are problematic? 1. The use of such signs by retailers is expressly prohibited by the ACL. 2. The terms regarding merchantable quality, fitness for purpose, etc implied by the ACL and the rights of consumers in the event of their breach cannot be excluded from consumer contracts. 3. No refunds clauses are void. 6 4. Such signs may amount to false and misleading conduct within the meaning of s18 of the ACL.