4. A system is called type-1 if it has an integrator e.g. G(s) = (-21)(s-22). A system is called type-2 if it has two integrators, s(s-p1)(s-p2) (5-21)(8-22) A system of type-n has n integrators (and n can be zero too). What is the system type for each of e.g. G(S)=2(s-p₁)(s-p2) the systems shown below? Hint: Look at the behavior of the plots at low frequencies. Bode Diagram BodeDagram 100 Phase (deg) Magnitude (dB) 20 15 10 5 0 10 Phase (deg) Magnitude (dB) 10 100p 50 Bode Diagram e ( Magne (d) -100

Fig: 1