Code and Output for big:

Code:

    <!DOCTYPE html>
    <html>
    <head>
      <title>HTML Example</title>
      <style>
      p.ex1{
        font-size:30px;
      }
      p.ex2{
        font-size:50px;
      }
      </style>
      </head>
      <body>
      <p>App Genesis soft solutions</p>
      <p class="ex1">App Genesis soft solutions</p>
      <p class="ex2">App Genesis soft solutions</p>
      
      
    </body>
    </html>
  

Output:

App Genesis soft solutions

App Genesis soft solutions

App Genesis soft solutions