Code 3 new fields on an existing PHP page (submit)

We have an existing PHP site with a MySQL database. This job is very simple - all you need to do is code three new fields to add to existing submission code on one PHP file. Please read the attached document for full details and instructions, and feel free to ask any questions. The document is password protected for security and the password is securepass You will be given full FTP and Cpanel access.