convert the recursion code bellow to alterative using loop  public String noX(String str){  if (str.length==0)  return "";  if (str.charAt(0)=='x')   return noX(str.substring(1));         return str.charAt(0) + noX(str.substring(1));     }

1  public static int sum(int x, int y){   2     int z = x +y;   3     return z;   4 }      5 public static void main(String[] args){    6    …    7      sum(a+2, b);    8  …    9 }      write the signature of the method sum: sum(int,int) *Method name/parameter list   list local variables of sum: x, y, and y are local variables of the function.    list the parameters of sum: int x, int y   write the line number where a call to sum occurs 7    list the arguments for the above call   list the return type of sum here ______________

Fix the code below so that there is a function that calculate the height of the triangle.   package recursion; import javax.swing.*;import java.awt.*; /** * Draw a Sierpinski Triangle of a given order on a JPanel. *  *  */public class SierpinskiPanel extends JPanel {     private static final int WIDTH = 810;    private static final int HEIGHT = 830;        private int order;     /**     * Construct a new SierpinskiPanel.     */    public SierpinskiPanel(int order) {                this.order = order;                this.setMinimumSize(new Dimension(WIDTH, HEIGHT));        this.setMaximumSize(new Dimension(WIDTH, HEIGHT));        this.setPreferredSize(new Dimension(WIDTH, HEIGHT));    }        public static double height(double size) {        double h = (size * Math.sqrt(3)) / 2.0;        return h;    }    /**     * Draw an inverted triangle at the specified location on this JPanel.     *      * @param x the x coordinate of the upper left corner of the triangle     * @param y the y…

The following recursive method called z is created. This method accepts two parameters: A string s, and an integer index  The code in the method is:      if (index == s.length())        return "";          <------ base case     if(index % 2 == 0)        return ""+ s.charAt(index) + z(s,index+1);           <---- recursive call     else        return z(s,index+1);             <----- recursive call   What would be the output with the call:   z("javajavajava",0);