阅读以下说明和Java程序，将应填入(n)处的字句写在对应栏内。

[说明]

下面程序输出一个矩形面积，以及矩形区域上的假想的作物产量。

[Java程序]

public class MainJava {

public static void main(String[] args){

Lot_size small=new Lot_size();

Lot_size medium=new Lot_size();

small.set(5,5,5，25);

medium.set(10,10,10,50);

System.out.println("For a small lot of area"

+small.get_area()+"\n");

System.out.println("the actual crops are $"

+small.get_data2()+"\n");

System.out.println("and ideal crops are $"

+small.get data()+"\n");

System.out.println("For a medium lot of area"

+medium.get_area()+“\n”)；

System.out.println("the actual crops are $"

+medium.get_data2()+"\n");

System.out.println ("and ideal crops are $"

+medium.get_data()+"\n");

}

}

class Crop_assessment{

private int actual_crop;

private int ideal_crop;

public void set(int in_actual,int in ideal){

actual_crop=in_actual;

ideal_crop=in_ideal;

}

public int get_actual_crop(){return (1) ;}

public int get_ideal_crop()(return (2) ;}

}

class Lot_size{

private int length;

private int width;

private Crop_assessment crop= (3) ;

public void set(int 1,int W,int a,int i){

length=1;

width=W;

crop.set(a,i);

}

public int get_area(){return length*width;}

public int get_data()freturn (4) ;}

public int get_data2()(return (5) ;}

}