Figure 2 shows the response of the system presented in Figure 3. The figure shows that the system is unstable for a Kc value of 140. If only Kc can be modified. Calculate a range for Kc such that the behaviour of the system is stable. 150 100 50 -50 -100 -150 -200 -250 0.5 1.5 Figure 2 D1 6 4s+1 Transfer Fcn Step Kc Ysp 4 -2 Scope 1 140 0.5 s+3 -s+1 Constant Gain Gain1 Transfer Fcn3 Transfer Fcn1 s+5 Transfer Fcn2 Figure 3