複選題22. Consider the autonomous system (A) the system is linear (B) the system has two equilibria (C) (x₁, x₂) = (2,-2), (-2, -2) are equiliria of the system (D) (x₁, x₂) = (-2, -2) is the only stable equilibrium of the system (E) (x₁, x₂) = (2, -2) is a saddle equilibrium of the system.