What is the effect of the Unfair Contract Terms Act ("UCTA") on exemption clauses?

1)The exemption clause is valid as long as it is incorporated into the contract by signature.

2)All exemption clauses are invalid under the UCTA.

3)An exemption clause can exclude liability for death due to negligence if it is fair and reasonable.

4)An exemption clause which exclude liability for death due to negligence is void.