H74 (Fail): Ensuring that opening and closing tags are used according to specification

HTML Snippet Code
Scenario 1: Opening and closing tags are not used as per the specification

This is H1

This is H2

This is H3

This is H4

This is H5
 <h1>This is H1 <h2>This is H2</h2> <h3>This is H3</h3> <h4>This is H4 <h5>This is H5</h5>

Deque Systems, Inc.