Question: For the relation R in Example 7.13, let f: Z+ R where f(n) = n. (a) Find three elements f1, f2, f3 F

For the relation R in Example 7.13, let f: Z+ → R where f(n) = n.
(a) Find three elements f1, f2, f3 ∈ F such that f1 R f and f R f1, for all 1 ≤ i ≤ 3.
(b) Find three elements g1, g2, g3 ∈ F such that g1 R f but f R g1, for all 1 ≤ i ≤ 3.

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