% Program P1_1 % Generation of a Unit Sample Sequence clf; % Generate a vector from -10 to 20 n = -10:20; % Generate the unit sample sequence u = [zeros(1, 10) 1 zeros(1, 20)]; % Plot the unit sample sequence stem(n, u); xlabel('Time index n');ylabel('Amplitude'); title('Unit Sample Sequence'); axis([-10 20 0 1.2]); Explain the function of each line in the program