Need help with complex Fourier series of an analogue wave.

Hi All,

I hope everyone is doing well and keeping safe.

I am trying to compute the complex fourier series of this waveform attached in the .mlx file. However, I am making a mistake somewhere which I can't find. Please can someone help me out, I am working late nights so that's why it seems I am making many mistakes recently. Have a look at the file attached.