tracking code

Hi there,
My theme is twentyelever. I had create a tracking code from google analytics. According to the installing instruction that I need to paste it to my every page before </body> or before </head>. Is that main paste it to index.php, page.php or single.php? Below is the code in my page.php file, I can’t find any </head> or </body> code there:

[Code moderated as per the Forum Rules. Please use the pastebin]

Is there anybody can help me for this?
Thanks