Answer:
Please see answer below and a screenshot of how it looks in the browser is attached.
Step-by-step explanation:
<!DOCTYPE html>
<html>
<head>
<title>Navigation</title>
</head>
<body>
<header>
<nav>
<ul>
<li><a href="jtc_index.html">Home</a></li>
<li><a href="jtc_services.html">Services</a></li>
</ul>
</nav>
</header>
</body>
</html>