Find the Laplace transform X(s) a) sketch the pole-zero plot with the ROC (region of Convergence), and write a program in MATLAB for the following signals x(t):

1) x(t) = e 2u(t) + eu(t) 2) x(t) = e u(t) + eu(t) 3) x(t) = eu(t) + e-u(t) 4) x(t) = 8(t - to)