The code for lab.html is: <!DOCTYPE html> <html lang="en"> <head> <title>Lab</title> <meta charset="utf-8"> <link href="style.css" rel="stylesheet"> <style> p.secondclass { color: red; } </style> </head> <body> <h1>Lab</h1> <p>This is a paragraph.</p> <p class="secondclass">This is a paragraph with class="secondclass".</p> </body> </html>