The third and fifth ones. They are relying on the ability of the search engine to understand human-like requirements. For any search engine, it should be easier to find a definition of a simple word, however, they are asking the whole question in order to obtain a more precise answer, maybe from a website that contains a similar question that has already been asked before.
Third and fifth students query the engine looking for a more specific answer that can fit their needs, so they don't have to do the analysis of information, just directly get the answer they need.
someone who is wealthy is rich therefore they are more likely to have high end things, cars,houses etc.. you would also assume they would be living a comfortable life, with little troubles.
