Trouble with lesson 12. don't know how to fix it


It pops up and says,"Oops, try again. Did you remember to include a href="stylesheet.css" in your tag? "

<!DOCTYPE html>
<link rel="stylesheet" type="text/css" href="stylesheet.css/>
		<h1 style="font-family: Verdana">Change me to Verdana.</h1>
		<h3 style="font-family: Courier">Change me to Courier.</h3>
		<p style="color: purple">Make me purple!</p>


The stylesheet.css file should be written as a string