Find sets A, B and C such that A ∩ B, B...

Find sets A, B and C such that `A ∩ B, B ∩ C and A ∩ C` are non-empty sets and `A ∩ B ∩ C = φ`.

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We may take `A = { 1, 2 }, B = { 1, 3 }, C = { 2 , 3 }`

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