Problem 2) a) Determine the compact trigonometric Fourier series representation of the square wave depicted below. Plot the frequency spectra for the first four harmonics. [10 points] b) Find the exponential Fourier series expansion of f(t). [5 points] c) What is the relationship between the power of a periodic signal f(t) and its exponential Fourier series coefficients? [Extra credit, 10 points] f(+) -2 -1 -I t