clc; clear all; close all;% part a - generation of discrete time signals% unit impulsen=-10:10;x1=(n==0);subplot (2,3,1)stem(n,x1); xlabel('n --->'); ylabel('x1(n)');title('Unit Impulse')% unit stepu=(n>=0);subplot(2,3,2)stem(n,u);axis([-10 10 -2 2]); xlabel('n --->'); ylabel('u(n)'); title...