I have a problem in Understanding Case Sensitivity in Variables

Tell us what’s happening:

Your code so far

// Declarations
var StUdLyCapVaR;
var properCamelCase;
var TitleCaseOver;

// Assignments
var StUdLyCapVar = 10;
var properCamelCase = "A String";
var tileCaseOver = 9000;

Your browser information:

Your Browser User Agent is: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 UBrowser/7.0.185.1002 Safari/537.36.

Link to the challenge:
https://www.freecodecamp.org/challenges/understanding-case-sensitivity-in-variables