Classify the following as Arrhenius, Brønsted-Lowry, or Lewis acid-base reactions. A reaction may fit all, two, one, or none of the categories:(a) Cu²⁺ + 4Cl ⇄ CuCl₄²⁻(b) Al(OH)₃ + 3HNO₃ ⇄ Al³⁺ + 3H₂O + 3NO₃⁻(c) N₂ + 3H₂ ⇄ 2NH₃(d) CN⁻ + H₂O ⇄ HCN + OH⁻