% Lab 1
% Question 4 

fs=4;						% Sample frequency 4[Hz]
ts=1/fs;					% Period is reciprocal of frequency

n=0:1:99;					% Sample indicies (0 to 99)
x(n+1)=cos(2*pi*n*ts/5)+sin(4*pi*n*ts/7)+cos(16*pi*n*ts/9);

stem(n,x,'linewidth',2);	% Plot samples on stem plot
xlabel('n')
ylabel('x(n)')