If u = p({1, 2, 3, 4}), what are the truth sets of the following propositions?

(a) a ∩ {2, 4} = ∅.

(b) 3 ∈ a and 1 ∈/ a.

(c) a ∪ {1} = a.

(d) a is a proper subset of {2, 3, 4}.

(e) |a| = |ac |.

Answer choices

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