Simple Q&A Website

Ok, here it is... I want a simple Q&A website: - People will have to register to post a question. - others don't have to register to read the answers. - People post their questions (all start with WHY) (If it doesn't start with a "Why" then it will show an error. - People get to rate each person's answer. - Users can edit their posts in the USER CONTROL PANEL - Administrator can add/edit/delete users and posts - Log in page for users and admin - DB must be in MySQL - Front-end must be in PHP with COMMENTS! (Comments are a must to understand your code. You will not get paid if this not done right) - Create a nice front-end using AJAX. Show me how YOU would do it when you bid. - Must be relatively secure against DB insertion and other common threats. - It is your duty to ask for the description of details that you are unsure of. You will get paid if and only if the website is complete, is installed on the our server, and it runs without errors.