Problem 4: Consider the periodic square wave x(t) shown in Fig 3-1. (a) Determine the complex exponential Fourier series of x(t). (b) Determine the trigonometric Fourier series of xff). To To 2T -A Fig 3.1 Problem 5: Consider the triangular wave x(t) shown in Fig 3.2. Using the differentiation technique, find (a) the complex exponential Fourier series of x(f). (b) the trigonometric Fourier series of x(f). www. 0 Fig 3.2 2 2T