Which of these is true in regard to ACL guarantees

1. Guarantees apply even if the defect did not exist at the time the goods were supplied

2. Guarantees apply even if the state of technical knowledge at the time of supply did not allow the defect to be discovered

3. Guarantees cannot be excluded from consumer contracts

4. Guarantees apply even if the defect resulted from the goods being used as a component inside another product and the defect is attributed to the design of that final product