% A6_56
%
% a)
T=0.01;
G=tf([80],[1 0.1 100]);%G=tf([-3e+004 2e-009],[1 0 4e+004 0]);
Gd1=c2d(G,T);
Gd2=c2d(G,T,'tustin');
figure(1);bode(G,Gd1,Gd2);legend('konti','zTrafo','Tustin');

% b)
sisotool(Gd2)

% c)
A9_56c;