public class Airplane $\{$

What is the output?private int totalSeats;

private int passengers;

public Airplane$()\{$

this.totalSeats $=250$;

this.passengers $=0$;

$\}$

public void addPassengers$($int passengers$)\{$

this.passengers $=$ this.passengers $+$ passengers;

$\}$

public int getAvailableSeats$()\{$

return this.totalSeats $-$ this.passengers;

$\}$

$\}$public class Airplane $\{$

private int totalSeats;

private int passengers;

public Airplane$()\{$

this.totalSeats $=250$;

this.passengers $=0$;

$\}$

public void addPassengers$($int passengers$)\{$

this.passengers $=$ this.passengers $+$ passengers;

$\}$

public int getAvailableSeats$()\{$

return this.totalSeats $-$ this.passengers;

$\}$

$\}$public class Airplane $\{$

private int totalSeats;

private int passengers;

public Airplane$()\{$

this.totalSeats $=250$;

this.passengers $=0$;

$\}$

public void addPassengers$($int passengers$)\{$

this.passengers $=$ this.passengers $+$ passengers;

$\}$

public int getAvailableSeats$()\{$

return this.totalSeats $-$ this.passengers;

$\}$

$\}$