Are these arguments valid?

Invalid

Invalid. Beckham might be a famous chef who is a football player but not a famous football player.

Invalid. Perhaps John shot Mary on Monday, and flew to Britain on Tuesday, but Mary died on Friday.

Invalid. As you know, rabbits can reproduce!

Not valid. Although the conclusion is very likely to be true given the premise, it is not a logical consequence of the premise. Perhaps a brillant doctor managed to save John.

Valid. This is a circular argument since the conclusion is also a premise. But it is nonetheless valid since it is impossible for the premises to be true while the conclusion is false.

Not valid. Those who are rich might not be the same as those who are nice.

A trick question! This is a necessarily true statement, but it is not an argument and so not a valid argument.

Not valid, since the increase in complaints might only be due to increase in the number of mobile phone users.

Someone is sick. Someone is unhappy. So someone is unhappy and sick.

If he loves me then he gives me flowers. He gives me flowers. So he loves me.

Beckham is famous. Beckham is a football player. Therefore, Beckham is a famous football player.

John was in Britain when Mary died in Hong Kong. So Mary could not have been killed by John.

There were only two rabbits in the room last week. No rabbit has left the room since then. Therefore there are only two rabbits in the room now.

John shot himself in the head. So John is dead

John shot himself in the head. So John shot himself in the head

Some people are nice. Some people are rich. So some people are rich and nice.

Every red fish is a fish.

The services of mobile phone companies are getting worse as there has been an increasing number of complaints against mobile phone companies by consumers.