The use of "realize" is incorrect in (1) and (2). (3) is a correctly formed sentence, but to me the formality of "analysed" seems a little mismatched with the informality of "kid". (4) is passable, but is not the greatest sentence ever written, in my opinion.
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mojtaba vahdatiThanks GPY.what's wrong with realize?"realize", in the closest relevant sense, describes an event that you have no direct control over. It "just happens". You can't really do something in order to "realize" something, as your sentences imply. You can use a word like "determine" or "ascertain" instead.