User reward system

[systutorials]

Hi everyone,

Does anyone know of a mod that exists for vbulletin 4.x that does the following:

-Forum thread is opened with a question,
-Users attempt to answer the question by replying to the thread
-The original user then marks the reply with the correct answer and that user is awarded points for helping out ?
-The total amount of points for a user is then displayed in their profile