Implement a function questionize in helper.js.
It should take a string, add a question mark ("?") to it and return this string as a result.

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helper.js

export const questionize = (s) => {
  return s;
}

solution.js

/**
 * Implement a function questionize in helper.js which should take a string and add a question mark ("?") to it
 * */

import { questionize } from './helper.js';

console.log(questionize('who are you')); // who are you?
console.log(questionize('me'));          // me?