How to create a synthetic signal then make Notch Filter

Hey guys, Is anybody know how to create a synthetic signal which contain frequencies 1Hz, 5Hz, 28 Hz?

Then I'd like to make Notch Filter in Matlab? for example I'd like to filter these following frequencies : 1Hz, 5 Hz, 33Hz

your help is needed

Answer 1

[Maria Stavrinou]

Fs=1; t=0:1/Fs:(200-(1/Fs)); freqRes=Fs/length(t);

F1=0.04; F2=0.3; x=1*sin(2*pi*t*F1);%+2*cos(2*pi*t*F2)+1*sin(2*pi*t*0.2); figure; plot(t,x); hold on;

[Maria Stavrinou]

I just give you my program for other frequencies but you can change it for yours!