... convolution:d1=[1 -0 .4 -0 .05];d2=[1 -0 .1 -0 .06];den2=conv(d1,d2).MATLAB gives us the vectorden2 = [1.00 -0 .50 -0 .07 0.029 0.003].Example 2.22We introduce three MATLAB functionsresiduez, impz ,and filter,whichare ... the scriptd1=[1 -0 .4 -0 .05];d2=[1 -0 .1 -0 .06];den2=conv(d1,d2).num=[1.5 -0 .2];[y,T]=impz(num,den2)We get the following result, which also agrees with the results from the pre-ceding two methods:y ... isb=[0 2 -1 1 12];a=[1 -7 18 -2 0 8];[r,p,k]=residuez(b,a) and the following is the output data we get:r = 3.0000 + 0.0000i0.5000 − 0.0000i− 0.5000− 3.000092TIME-DOMAIN ANALYSIS AND z TRANSFORMp...