Are whoever ,whichever and whatever relative pronouns which is used to modify nouns in adjective clauses?
eg:
Most workers, whoever was not employed by the auto manufacturer, toiled at one of the millions of little minnow companies.
The three approaches, whichever works is fine, produce a more ambiguous picture of a man.
Any excessive profits, whatever exceeded accepted limits, would attract the notice of representatives.
Are these sentences correct? And can we use whoever, whichever and whatever as relative pronoun?