The students who turned in their extra credit HW by Tuesday End-Of-Day need to grade their work, in the same way that we grade the weekly homework. It is always important to review problems practiced at home in this way!
The correct answers are here (CLICK). Make sure that you use a marker or different color pen to mark what is correct and incorrect, and to add relevant comments whenever you can.
I know I won't be there with you to help you with additional questions you have, so do your best grading your work at home. The internet might help you write some good comments!