Its grand assignment, completion would show you well understand fundamental concepts of web application development. You must have visited olx.com.pk, below assignment of classified management system (AdSys for short) works like olx in general (though limited in functionality). Users shall post ads for others to view. They shall signup, login and update, activate, deactivate and delete ads. Below is the detail of individual feature you shall develop to get full marks. See above image i.e. entity relationship diagram (ERD) of AdSys. Make database in MySQL based on above ERD. (You can download the SQL script of database design, from here ). Import the SQL script into your MySQL database. Below are the features you must implement using PHP, HTML, and CSS. Use Bootstrap wherever applicable. Sign Up (signup.php): When user open singup.php page, show a registration form (see fields from users table). Register the user using post-back approach. The city should be a drop down list (enter any 5...