Q1/ A / Choose one point of the following signals to generate it by using MATLAB code: (15 Marks) 1.8 (n-3). 2. u (n+2). Notes: 1. The figure must have x-label, y-label, and title. 2. The ranges of figure as followed: x-axis = [-4 4] and y-axis = [03]. 3. The range of discrete time (n) = (-4:1:4)