The family of subsets of any set "S" is called the power set of "S", so the answer to question 7 is a).
Assuming that the universe is the set of natural numbers "\\mathbb{N} = {1, 2, 3, ...}" , by definition, the complement of E is "E^c = \\mathbb{N} \\setminus E = 1, 3, 5, ..." - the set of odd numbers, so the answer to question 8 is a).
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