A website for practice quiz, Mock tests and tutorials.

Hi, I need someone who is able to develop a website which contains practice quiz, Mock tests and tutorials. Here are the specifications. - very very very professional design. - should be a database driven membership website which tracks user progress throughout the website and provides user analytics .(like [login to view URL]) - must have a tutorials section.(like [login to view URL]) . - should have a practice section.(where user practices all the topics mentioned in tutorials section) - mock tests section. (where users can take timed tests) - whole site should be touch friendly including multiple choice questions. - it should be compatible with all browsers and on all screen sizes (mainly on tablets). - admin must be easily able to add tutorials OR practice questions for tutorials OR mocktests through a CMS. more details will be provided on request.