Design and implement a class country that stores the name of the country, its population, its area, and the population density (i. e., people per square kilometer (or then, write a program that reads data. txt and prints: - the country with the largest area.- the country with the largest population.- the country with the largest population densitythis quesiton requires two python files. one is a country class file and the other is the program that leverages the methods from the country class and print the above three requests. you could leverage set()to store country information and do the operations. in the data. txt, the attributes of each row refer to "country", "population", and "area".data. txt: china 1,339,190,000 / 9,596,960.00united states of america 309,975,000 / 9,629,091.00brazil 193,364,000 / 8,511,965.00japan 127,380,000 / 377,835.00canada 34,207,000 9,976,140.00

This question involves a class named textfile that represents a text file. public class textfile { private string filename; private string filename; private arraylist words; // constructors not shown // postcondition: returns the number of bytes in this file public int filesize() { } // precondition: 0 < = index < words. size() // postcondition: removes numwords words from the words arraylist beginning at // index. public void deletewords(int index, int numwords) { } // precondition: 0 < = index < = words. size() // postcondition: adds elements from newwords array to words arraylist beginning // at index. pub lic voidaddwords(int index, string[] newwords) { } // other methods not shown } complete the filesize() method. the filesize() is computed in bytes. in a text file, each character in each word counts as one byte. in addition, there is a space in between each word in the words arraylist, and each of those spaces also counts as one byte. for example, suppose the words arraylist stores the following words: { mary had a little lamb; its fleece was white as snow. } the filesize() method would compute 4 + 3 + 1 + 6 + 5 + 4 + 6 + 3 + 5 + 2 + 5 as the sum of the lengths of each string in the arraylist. the value returned would be this sum plus 10, because there would also be 10 spaces in between the 11 words. complete the filesize() method below: // postcondition: returns the number of bytes in this file public int filesize() { }