Referring to the HTML markup and CSS example below, which element(s) will be targeted?
p:first-of-type:first-letter {
color: red;
}
<body>
<p>Paragraph 1.</p>
<p>Paragraph 2.</p>
<article>
<h1>Heading</h1>
<p>Paragraph 3.</p>
<p>paragraph 4.</p>
</article>
<section>
<p>Paragraph 5.</p>
<p>Paragraph 6.</p>
</section>
</body>