(a) Predicate: 6/d is an integer, domain: Z (b) Predicate: 6/d is an integer, domain: Z + (c) Predicate: 1 ≤ x^2 ≤ 4, domain: R (d) Predicate: 1 ≤ x^2 ≤ 4, domain: Z
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(a) Predicate: 6/d is an integer, domain: Z (b) Predicate: 6/d is an integer, domain: Z + (c) Predicate: 1 ≤ x^2 ≤ 4, domain: R (d) Predicate: 1 ≤ x^2 ≤ 4, domain: Z