REVIEW: Set Theory - Euler diagrams

In which diagram does the shaded area show the union of A and B?

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In which diagram does the shaded area show the intersection of A and B?

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In which diagram does the shaded area show the difference of A and B?

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In which diagram does the shaded area show the difference of B and A?

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Which diagram shows A is a subset of B?

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Which diagram shows A is a superset of B?

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