clc, close all, clear
u = 1;
t1 = 0:0.01:10;
% a) ----------------------------------------------------------------------
y1 = t1*u;

syms t
G = laplace(t);
G = char(G);
s = tf('s');
G = eval(G);
G = G*s;
y2 = step(G,t1);

figure;
set(gcf,'DefaultLineLineWidth',4);
set(gcf,'DefaultAxesFontSize',14);
plot(t1,y1)
hold on
plot(t1,y2,'--r')
hold off
grid on