Let A = {1, 2, 3}. For each of the following relations state (no
proofs required) whether it is (i) both a function and an
equivalence relation (ii) a function but not an equivalence
relation (iii) an equivalence relation but not a function (iv)
neither a function nor an equivalence relation (a) {(1, 1),(2,
2),(3, 3)} ⊆ A × A (b) {(1, 1),(2, 2)} ⊆ A × A (c) {(1, 1),(2,
2),(3, 2)} ⊆ A × A (d) {(1, 1),(2,...