Can you please answer these question with explanation?

For Questions 4 and 5 reference the following code class Song( String title; String artist int year public Song(String title, String artist, int year) this.title title; this.artist artist this.year year, class Playlist String title Songl songs int numSongs; public Playlist(int length, String title) this.title title; s new Songlengthl: this.numSongs 0 for (int i 0; i= this. songs. length ll index