[填空题]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,in