The answers to exercises marked [BB] can be found in the Back of the Book.
Determine whether each of the following statements is true or false. Justify your answers.
(a) [BB] ∅ ⊆ ∅
(b) ∅ ⊆ {∅}
(c) ∅ 6∅
(d) ∅ ∈ {∅}
(e) [BB] {1, 2} ⊈ {1, 2, 3, {1,2,3}}
(f) {1, 2} ∈ {1, 2, 3, {1, 2, 3}}
(g)
(h) [BB] {1,2} ∈ {1,2, {{1,2}}}
(i) {{1,2}} ⊆ {1,2,11,2}}
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