My skill doesn't change

I am a beginer. I have typed the following code up as prompted:
“use strict”;

var Alexa = require(“alexa-sdk”);

var handlers = {
‘LaunchRequest’: function() {
this.response.speak(“Hello, Welcome to Codecademy. What do you think is Codecademy’s most popular language?”).listen(“Tell me what you think is Codecademy’s most popular language.”);

‘LanguageIntent’: function () {
this.response.speak(“Python is our most popular language.”);

exports.handler = function(event, context, callback){
var alexa = Alexa.handler(event, context);

yet when I test the skill, I tell alexa to open code academy and she just replies “Welcome to Codeacademy” instead of replying whatever I wrote for her to do. I made sure to link ARN and everything… it doesn’t seem to work. Could you please help?