4. Compute and plot the results of each of the following convolutions: (a) ut) u(t- 2)…

4. Compute and plot the results of each of the following convolutions: (a) ut) u(t- 2) (b) a(t-1)、n(t-2) (d) u2) ut) t- 2)] (e) u2) [ul) – u(t – 2)]