given the following code fragment which defines $3$ methods:

public final int getAge$()\{$ return ; $\}$

private final void setAge$($int age$)\{$ ; $\}$

public ageProperty$()\{$ return ; $\}$

what code replaces if the methods follow OO design rules and standard naming coventions?

SimpleIntegerProperty

IntegerProperty

int

ReadOnlyIntegerProperty

SimpleReadOnlyIntegerProperty