using mathematica

The goal of the following problem is to reproduce Figure 10.5 of the textbook (Example 5, Section 10. Chapter 14). The below plots show (1) equipotentials solid lines) and (2) field lines (dashed lines) at the end of a semi-infinite capacitor. The plates of the capacitor are at y= and y=-7 and extend over the range x el-.,-1]. The plots show only the y> 0 equipotentials and field lines. Modify the given codes so that the plots show equipotentials and field lines for both y> 0 andy 0 equipotentials and field lines. Modify the given codes so that the plots show equipotentials and field lines for both y> 0 andy