I aced that class. This class is extremely difficult because I don't have the right software to automatically solve the problems, it just won't work on any of my machines. There's 6-7 of us with the same issue, IT has been unable to help fix it too. So everything gets solved by hand and thus, a higher mistake rate. Especially when the book is geared solely around said software and doesn't tell you what equations are to be used if you did have to solve it by hand