Consider the following Country class

public class Country$\{$

String name;

int population;

double size; $//$ size in km$^2$

public Country$($String name, int pop, double size$)\{$

this.name $=$ name;

this.population $=$ pop;

this.size $=$ size;

$\}$

$\}$

If we want this class to implement the Comparable interface so that we can compare Country objects, how should the first line be re$-$written?