GIVEN THE CODE BELOW
Given the following class:
/**
* Document class.
*/
public class Document {
private int words;
/**
* constructor
* pre: none
* post: A Document object created. Words initialized to 0.
*/
public Document() {
words = 0; //default words
}
/**
* Changes the number of document words.
* pre: none
* post: Words has been changed.
*/
public void setWords(int numWords) {
words = numWords;
}

/**
* Calculates the number of pages.
* pre: none
* post: The number of pages has been returned.
*/

public int calculatePages() {
final int WORDS_PER_PAGE = 300;
int pages;
pages = words / WORDS_PER_PAGE;
if (words % WORDS_PER_PAGE > 0) {
pages += 1;
}   
return(pages);
}

/**
* Returns the number of words in a document.
* pre: none
* post: The number of document words has been returned.
*/
public int getWords() {
return(words);
}
}

Create an Essay class that inherits the Document class. The Essayclass should include member constants MIN_WORDS andMAX_WORDS.
An essay should be between 1500 and 3000 words. The Essay classshould also contain
a member method validLength(), which returns true when the Essayobject contains between MIN_WORDS and MAX_WORDS and falseotherwise.
**Create an EssayAssignment application that tests the Essay class.EssayAssignment will contain the main() method.