Write a function [change, flag] = makechange(cost, paid)that takes the cost of an item cost (a 1x1 double) and the amount paid by the buyer paid (a 1x1 double), and returns a n x 1 column array of doubles change containing the bills that the seller should give back to the buyer in decreasing bill size ( from $100-$1) and flag a 1x1 logical true or false saying whether the transaction was "completed". if paid is less than cost, flag is false and you should display a warning in the command window saying "that’s not enough money to buy the item." and change is assigned as an empty array. if cost and paid are equal the change is a 1 x 1 double of value zero and flag is true. if paid is greater than cost, flag is true and ch

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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() { }