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Use the element method for proving a set equals the empty set for the following problem. Assume that all sets are subsets of a universal

Use the element method for proving a set equals the empty set for the following problem.

Assume that all sets are subsets of a universal set U.

For all sets A, B, and C, if B C A, then (C A) (B A) = .

Please show each step and explains so I can understand better thanks

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