'If Sneha tampered with the examination script, then she is guilty of a crime. Sneha did not tamper with the examination script. Therefore, Sneha is not guilty of a crime'. Which fallacy is committed in the ab ove argu ment?

Which formal fallacy is committed in the following argument: 'If your pet is a cat, then it has a tail. Your pet is not a cat. Therefore, your pet does not have a tail.'?

'If you read Professor Harry's book, you should be able to recognise and successfully attack fallacious reasoning, and you are able to do that. Therefore, you must have read Professor Harry's book.' Which formal fallacy is committed in the above argument?