% Solution of Problem 2.19
num1=[3 -1 0]; den1=[1 2 5];
num2=[2 1 0]; den2=conv([1 4],conv([1 -1],[1 -0.2]));
n=0:1:10;
subplot(211)
[y1,x1]=dstep(num1,den1,11);
dstep(num1,den1,11);
grid
ylabel('y1')
disp(' ')
disp('Output samples for y1')
y1

subplot(212)
[y2,x2]=dimpulse(num2,den2,11);
dstep(num2,den2,11);
grid
ylabel('y2')
disp(' ')
disp('Output samples for y2')
y2