1) The set of letters in the word “MATATAG” a) Well-defined b) Not well-defined 2) S = {5, 10, 15, 20, 25 } a) Finite set b) Empty set c) Universal set d) Infinite set 3) Find the cardinality of the given sets. E = {Ni-ki, Sunghoon, Jungwon, Jake, Heeseung, Sunoo, Jay}  a) 5 b) 6 c) 7 d) 8 4) What is the symbol for an empty set or null set a) ..., b) ∈ c) ⊆ d) ∅ 5) {1, 2, 3} ⊆ {1, 2, 3, 4, 5} a) TRUE b) FALSE

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