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For each of the following cardinalities, provide an example of two uncountable sets A and B such that A O B has the desired cardinality

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For each of the following cardinalities, provide an example of two uncountable sets A and B such that A O B has the desired cardinality. Include in your justification what AO B is. (a) Finite (b) Countably infinite (c) Uncountable infinite Note: A O B is the symmetric difference of the sets A and B, i.e. the set containing all elements which are in A or in B but not in both.