Juno just started her master program at UIC this semester. As Juno is new in Chicago, she has tried several restaurants based on Opentable reviews, but none of them is truly satisfactory. She concludes that the review system does not match well with her taste because the star$-$ratings are too detailed. Opentable reviews consist of four different attributes: food, ambiance, service, and noise level. Now she wants to simplify evaluation criteria of those attributes as follows: