Lesson 23: I'm stuck

#1 
<!DOCTYPE html>
<html>
	<head>
		<link type="text/css" rel="stylesheet" href="stylesheet.css"/>
		<title>Result</title>
	</head>
	<body>
		<!--Add your HTML below!-->
		<h3 class="fancy">This is an h3 header<h3>
		<p class="fancy">This is a paragraph under the header</p>
		<p id="serious">Here is yet another paragrph for testing</p>
		<p> Oh, yet another paragraph. Fun.</p>
	</body>
</html>
/*and the css*/
/*Add your CSS below!*/
.fancy {font-family:cursive;
    color:violet;
}
#serious {font-family:Courier;
      color:#8c8c8c;
}
  body :nth-child(4) {font-size:26px;
}
#2

If I'm not mistaken, you're supposed to use 

p:nth-child(4)

They're telling you that when you use nth-child, you have to count all the children in the body, not just the ones that are the same as the element you're trying to change.

#3

@eternallocket, p:nth-child(4) and body :nth-child(4) are both correct. but p:nth-child(4) will only get "executed" if you the 4th element is a paragraph, and body :nth-child(4) will always select the 4th element inside body (the space between the css selector and the colon makes a huge difference)

@wyattonix, your h3 closing tag is missing a slash, messing up the count

#4

I got the exact same mistakes.

it's good to know that body:nth-child(4) and body :nth-child(4) are actually different because of a space.

#5