You should be able to download Homework 1 solutions (in pdf version of “written” solutions) , and an alternate version of those solutions using Mathematica (in a notebook file) from the math421-murray UDrive. That course UDrive should have sent you an e-mail containing a link to its “Homework solutions” folder.

As an expedient, in case you are having trouble with that, I’ve put direct links to the files on the Homework page of this course web site.