Question: Is U,V not a candidate key because it doesn't include Y and U? If not, then why is it or is not a candidate key?

Is U,V not a candidate key because it doesn't include Y

Is U,V not a candidate key because it doesn't include Y and U? If not, then why is it or is not a candidate key?

Given the Relation S21 = {U, V, W, X, Y} with the following dependencies: {U, V} {X} {W, X} {Y} {X,Y} {U} a. Is{U, V} a candidate key of S21? Explain

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