2. A pneumatic control system uses a differential pressure sensor to measure differential pressure across a valve actuator. The pressure versus time plot below shows an example output from this sensor. In preparation for doing a spectral analysis of this signal, you decide to calculate the Fourier series for the signal to get a qualitative understanding of the frequencies that contribute to give the overall pressure versus time signal. Pressure (kPa) Time (s) 0 01 obi a) Determine the period, 7, the fundamental frequency, @, and the a, coefficient of the Fourier series for the trace in this diagram. (Note: show your work leading to the final answer)