The equation for the first cycle (0  t  T0) of a periodic pulse train is vðtÞ ¼ VA½uð3t  T0Þ  uð3t  2T0Þ V

(a) Sketch the first two cycles of the waveform and identify a related signal in Figure 13–4.

(b) Use the Fourier series of the related signal to find the Fourier coefficients of v(t).