For the given Charge density (Fig. 2), determine the following: (7 Marks) (a) ε(x) for −xp < x < 0 and 0 < x < xn (b) V(x) for −xp < x < 0 and 0 < x < xn (c) xn, and xp (d) Roughly draw the shape of ε(x), V(x), and Band diagram. [Semiconductor Device Fundamentals Section 5.2] Fig. 2