[varargout{1:nargout}] = matlab.sys​tem.intern​al.execute​Command(va​rargin{:})​; ERROR

I have the following question

**In this part, you must synthesize a set of waveforms using different numbers of Fourier coefficients.

Use fplot to call the syn fourier synthesis function that generates xN(t) from a finite number

of terms. Do the cases for N = 2, N = 4 and N = 8.7 For each of these synthesized signals make

a plot showing the synthesized signal xN(t) and the desired x(t) on the same plot. Use a three-panel

subplot to show the three cases on one page.

Note: one advantage of using fplot is that it will generate a time grid that is dense enough to show

the details of the synthesized signal**

I have written the following code for it

for N=2

N=2;

ak=system(N);

k=N

t0=0.01;

fk=k/t0;

fplot('syn_fourier',[o,t0],200,[],[],'ak',fk)

end

but i am getting this error

[varargout{1:nargout}] = matlab.system.internal.executeCommand(varargin{:});

Error in Untitled3 (line 3)

ak=system(N);

Can someone please help me with this i am new to matlab