I need help

import greenfoot.*;  // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)

/**
 * Write a description of class HomeworkWorld here.
 * 
 * @author (me) 
 * @version (1)
 */
public class HomeworkWorld extends World
{
    /**
     * INSERT CODE BEOLW
     * Add two instance variables that are of type String[]
     *        one will be an array of images
     *        one will be an array of sounds
     *        DO NOT INCLUDE THE FILE SUFFIX - add that through code later
     *        
     *        Note - each image is 55x55
     */
           private String[] image = {"smiley1.png", "smiley2.png","smiley3.png","smiley4.png","smiley5.png"};;
           private String[] soundfile = {"hello.wav","happy.wav","crying.wav","ohno.wav","raspberry.wav"};
    
        
    /**
     * Constructor for objects of class HomeworkWorld.
     * 
     */
    public HomeworkWorld()
    {   
        
        // Create a new world with 400x100 cells with a cell size of 1x1 pixels.
        super(400, 100, 1); 
    }
        
        /**
         * INSERT CODE BELOW
         * Write a "for" loop
         *      It should loop 5 times  (you can either hard code 5 or use code)
         *      It should use the method addObject( Actor object, int x, int y) to add new Emoticons to your world.
         *      Note:  concatinate the ".png" for images  and ".wav" for the sounds
         *      
         *      Determine the x value using a mathematical calculation
         *      The y value can be either hard coded or calculated
         *      
         */ private void makeImages()  
                   {  
                       //make the Emoticon Images  
                       for(int i = 1; i<5; i++)  
                       {  
                            Emoticon emoticon = new Emoticon();  
                            addObject(newEmoticon(images[i]+".png",sound+".wav", 10*(i+60), 50));  
                                   }  
                }  
            }