Question

Is there a problem set for Unit 5 or any kind of practice that I could do to review the material covered in Unit 5?

Answer 1

interactmath.com is full of practice problems, and the site is free. Just pick a textbook that is in your subject of interest and practice away with it :)

I got no idea what a unit 5 is or whats covered in it to give anything more specific ...

Answer 2

You might want to ask about that on the MIT site, in case they have something useful (Use "Contact Us" link at the top of the MIT course page). Otherwise, try googling the rules you learned, many sites have related problem sets.