For sections with repetitive actions in the code below use a loop. You can submit more than one solution. You can use while or for etc THE LANGUAGE IS (( MATLAB ))

%% Discrete signal with a sampling frequency of 10 Hz

fa=10;

ta=1/fa;

t1=0:ta:10-ta;

xa=2+6*cos(2*pi*10*t1)+cos(2*pi*20*t1);

%% Discrete signal with a sampling frequency of 15 Hz

fb=15;

tb=1/fb;

t2=0:tb:10-tb;

xb=2+6*cos(2*pi*10*t2)+cos(2*pi*20*t2);

%% Discrete signal with a sampling frequency of 20 Hz

fc=20;

tc=1/fc;

t3=0:tc:10-tc;

xc=2+6*cos(2*pi*10*t3)+cos(2*pi*20*t3);

%% Discrete signal with a sampling frequency of 40 Hz

fd=40;

td=1/fd;

t4=0:td:10-td;

xd=2+6*cos(2*pi*10*t4)+cos(2*pi*20*t4);

%% Discrete signal with a sampling frequency of 60 Hz

fe=60;

te=1/fe;

t5=0:te:10-te;

xe=2+6*cos(2*pi*10*t5)+cos(2*pi*20*t5);

%% A tiledlayout to plot the original signal and the discrete signals continously

tiledlayout(3,2);

% Each plot has the same axis boundaries and y and x labels but differe from the others in the title and what is plotted on the x and y axis

nexttile

plot (t,x)

title('fs=300');

axis ([0 1 -4 10]);

xlabel ('time(t)')

ylabel ('Amplitude')

nexttile

plot (t1,xa)

title('fs=10');

axis ([0 1 -4 10]);

xlabel ('time(t)')

ylabel ('Amplitude')

nexttile

plot (t2,xb)

title('fs=15');

axis ([0 1 -4 10]);

xlabel ('time(t)')

ylabel ('Amplitude')

nexttile

plot (t3,xc)

title('fs=20');

axis ([0 1 -4 10]);

xlabel ('time(t)')

ylabel ('Amplitude')

nexttile

plot (t4,xd)

title('fs=40');

axis ([0 1 -4 10]);

xlabel ('time(t)')

ylabel ('Amplitude')

nexttile

plot (t5,xe)

title('fs=60');

axis ([0 1 -4 10]);

xlabel ('time(t)')

ylabel ('Amplitude')

%% A tiledlayout to plot the original signal and the discrete signals as stems

tiledlayout(3,2);

% Each stem has the same y and x labels but differe

% from the others in the title and what is plotted on the x and y axis.All the stems has the same axis boundaries except for the one original signal as we need shorter x axis to view it in a better way.

nexttile

stem (t,x)

title('fs=300');

axis ([0 0.2 -4 10]);

xlabel ('time(t)')

ylabel ('Amplitude')

nexttile

stem (t1,xa)

title('fs=10');

axis ([0 1 -4 10]);

xlabel ('time(t)')

ylabel ('Amplitude')

nexttile

stem (t2,xb)

title('fs=15');

axis ([0 1 -4 10]);

xlabel ('time(t)')

ylabel ('Amplitude')

nexttile

stem (t3,xc)

title('fs=20');

axis ([0 1 -4 10]);

xlabel ('time(t)')

ylabel ('Amplitude')

nexttile

stem (t4,xd)

title('fs=40');

axis ([0 1 -4 10]);

xlabel ('time(t)')

ylabel ('Amplitude')

nexttile

stem (t5,xe)

title('fs=60');

axis ([0 1 -4 10]);

xlabel ('time(t)')

ylabel ('Amplitude')