Consider the discrete-time LTI system with impulse response h[n] = {1 n = 0, 1, 2, 3, 4 0 otherwise The signal at the system input is x[n] = delta[n] – delta[n – 2] where delta [n] is the unit impulse function. A) Derive the expression of the signal at the output of the system, i.e., y[n]. Sketch and label carefully y[n] pt. 20].