Sethian Math 53

Hello~
Are any of Sethian’s past midterms or finals online in cyberspace somewhere?
I’m taking his Math 53 class right now and am definitely not prepared for the upcoming midterm.
I’ve heard his final is insanely tough, so getting an idea of what I have to prepare for would be great.
Also, are there any other resources to help me get through the class?

Other Math 53 exams can be found here:

https://tbp.berkeley.edu/courses/math/53/
https://math.berkeley.edu/courses/archives/exams/math-53

Harder ones can be found here:

https://tbp.berkeley.edu/courses/math/h53/