What's wrong with this code?

<html>
 <head>
  My webpage
</head>
<body>
  <h1>My favorite things</h1>
  <p>
  Raindrops on <em>roses</em><br>
  Whiskers on <strong>kittens</strong> 
  </p>
 </body>
</html>]]>The title element is missingThe <br> tag is missing a closing </br> tagThe second text line also needs a <br> tagIt's <doctype! html> not <!doctype html>