The characteristic equation of a unity feedback control system is given by s³ + K₁s² + s + K₂ = 0. Consider the following statements in this regard
1. For a given of K₁, all the root-locus branches will terminate at infinity for K₂ in the positive direction.
2. For a given value of K₂, all the root-locus branches will terminate at infinity for variable K₁ in the positive direction.
3. For a given value of K₂, only one root-locus branch will terminate at infinity for variable K₁ in the positive direction. Of these statements—