public class TextFile
{

private String fileName;

private ArrayList<String> 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.

public void addWords(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.