Compute the convolution y[n] = x[n]+h[n] of the following pairs of signals and impulse response functions. (a) x[n] = au[n], h[n] = ß^u[n], a ẞ (b) x[n] = h[n] = au[n] (c) x[n]=(-)"u[n = 4], h[n] = 4"u[2 - n] -