Count the empty lockers.

A high school has a specific number of lockers so students can store their belongings. The office staff wants to know how many of the lockers are empty so they can assign these lockers to new students. Consider the following classes and complete the implementation for the countEmptyLockers method.

public class Locker

$\{$

private boolean inUse;

public boolean isInUse$()$

$\{$ return inuse; $\}$

public void setInUse$($boolean isInUse$)$

$\{$ inUse $=$ is InUse;