Justify that your observer works (use matlab to simulate for the error) 3- Using the pole-placement-with-observer approach a- Design observer controllers with a full-order observer, and b- Design observer controllers with a minimum-order observer for the system shown below. The desired closed-loop poles for the pole-placement part are: λ=-1j2,-5 R(s) U(s) Y(s) + Observer Controller S² + 2S+50 S(S+4)(S+6) and the restrictions on choosing the desired observer poles are that they should be all the same and real (for both full and minimum order observers). Compare the unit step response of the two designed systems.