Please explain step by step

Type the following code in Matlab and see the results. X = -2 pi: 0.1: pi 2: step heaviside (X): Exp = exp(X): figure (1): subplot (2, 1, 1): plot (X, step): title ('1)...'): grid minor axis ((-2 pi 2 pi -.5 1, 5)) subplot (2, 1, 2): plot (X, Exp): title ('2)...): grid minor axis ((-2 pi 2 pi -.5 1.5)) What are these functions' name? Calculate the energy of the second signal for X > 0. Make some change to make your plot look like the following figure