... Response');xlabel('frequency in pi units'); ylabel('Decibels');%subplot(2,2,2); plot(w/pi,pha/pi);axis([0,1 ,-1 ,1]); gridtitle('Phase Response');xlabel('frequency ... gridtitle('Amplitude Response');xlabel('frequency in pi units'); ylabel('|Hr(w)|');%subplot(2,2,3); plot(w/pi,db);axis([0,1 ,-3 0,10]); gridtitle('Magnitude ... units'); ylabel('Angle(Hr(w))');%subplot(2,2,4); plot(w/pi,grd);axis([0,1,0,15]); gridtitle('Group Delay');xlabel('frequency in pi units'); ylabel('Samples');...