Can somebody check my model?

Hi all,

Just doing some CSWP practice from some PDF I found online. I am currently having difficulty seeing where my part may be incorrect. None of the multiple choice answers match my mass! I am almost hesitant to say that the practice exam has an error in its answers, but I would like to gather some feedback first. The part I am stuck on is part 4.

Attached are the exam PDF and the part file.

Thanks!

SolidworksGeneral