Write out each of the sets listed below. The resulting sets should not have duplicates.

P (A) refers to the power set of set A, i.e., the set of all subsets of A.

(a) { {a, 1, 2 }, [a, 1, 2] } { {2, 1, a }, [2, 1, a] }

(b) { a, 1, 2 } { { a, 1, 2 }, [a, 1, 2] }

(c) { a, b, 1, 2, } { a, c, 2, 3, }

(d) P ( {b, {a, b} } )

(e) { a, 1 } { { a, 1 }, }