a) Plot the signals given below (manually). (2 marks) x(t) = 2u(t) - 2u(t - 1) r(t) = {uce) – žuct – 2) b) Compute the convolution of the two signals given in time domain. You should show step by step of your calculation. (5 marks) c) Obtain the convolution of the two signals above using MATLAB programming. Plot the result produced in MATLAB. (8 marks) (Hint: You can use Fourier Transform or Laplace Transform for Question (c))