Consider the following statements:
To claim the benefit of provocation in reducing the liability for murder the offender must prove that the:
1. Provocation was sufficient in ordinary course of nature to cause a person of ordinary temper to lose his self-control.
2. Provocation was grave and sudden to justify the killing
3. Provocation was so grave that it would stir a desire for revenge
4. Sufficient time did not elapse so as to cool down the passion
Of these statements: