(b) Sketch the signal x[n] = 8[n] - 8[n-3] for n = -3:5 with proper label. (c) Sketch the signal x(t) = u(t+4) u(t-4) for t = -6:6 with proper labels (d) Sketch the discrete signal x[n] = -u[n+3] + 4u[n+1] - 4u[n-2] + u[n-4] for the time n = -6:6 and appropriately label the figure. (e) Write an expression in the expanded form for the discrete signal x[n] in the figure below as sums of weighted delayed impulses. 4 4 0 1 3 5 6 7 8 W