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Prove the following: • A'∩(A∪B)=A'∩B • A'∪(A∩B) = A'∪B • if A ⊆ B then B...

Prove the following:

• A'∩(A∪B)=A'∩B
• A'∪(A∩B) = A'∪B
• if A ⊆ B then B ⊆ A

• A−(B−A)=A

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