What is the crime of extortion?

1. After the victim was found stealing other people's property, the perpetrator beat the victim out of anger and threatened to report and extort property.

2. After killing the victim, the perpetrator extorted money from the victim's relatives on the grounds that the victim was kidnapped.

3. The perpetrator lured the young victim to the hotel, threatening the personal safety of the victim, and repeatedly asked the relatives of the victim to pay the ransom.

4. By sending a threatening email to the hotel, the actor asks for remittance to the bank account designated by the opposite party.