<html>
<head>
<style>
h1 {font-size: 4.5pc;}
h2 {font-size: 3pc;}
p {
font-size: 1.5pc;
line-height: 3pc;
}
</style>
</head>
<body>
<h1>This is heading 1</h1>
<h2>This is heading 2</h2>
<p>This is a paragraph.</p>
<p>This is another paragraph.</p>
</body>
</html>