Please help me write pseudocode, a flowchart drawn out with the appropriate shapes, and a test case matrix for the following Java code:

import java.util.Scanner;

public class Exercise$03\_11\{$

public static void main$($String$[]$ args$)\{$

Scanner input $=$ new Scanner$($System$.$in$)$;

$//$ Prompt the user to enter the number of sides

$//$ and their length of a regular polygon

System.out.print$("$Enter the number of sides: $")$;

int numberOfSides $=$ input.nextInt$()$;

System.out.print$("$Enter the side: $")$;

double side $=$ input.nextDouble$()$;

$//$ Compute the area of a regular polygon

double area $=($numberOfSides $*$ Math.pow$($side$,2)/$

$(4*$ Math.tan$($Math$.$PI $/$ numberOfSides$)))$;

$//$ Display result

System.out.println$("$The area of the polygon is $"+$ area$)$;

$\}$

$\}$