Project management php+mysql

Good evening! I need help! php+mysql. In short, the task of the staff. The main one adds a task to the system, the heads of the department immediately reminded - another task came from the main one. They break this task into steps and send it to their subordinates as well. And the subordinates are already doing it. They put a date on when they're done. And the bosses can track who is overdue when what tasks are overdue or how many more percent of the task is left to do. You don’t have to write a full-fledged task management system, only the most basic, with a minimum of a simple interface. for coursework. The price of the question is: BD is ready. I will write more if anyone takes it.