User Agent is: Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.108 Safari/537.36 UCBrowser/12.14.0.1221.
For the Responsive Web Design projects, you need to have them hosted on the internet, publicly. This can be done through CodePen, GitHub pages, or similar. Then, you should be able to copy the URL to your project, and paste it in the corresponding solution box.