7.5 (part 1), due March 16

This section didn't make much sense to me.  I understood the idea and the concept that I was supposed to be understanding but I just couldn't make sense of it.  I understood the definition of congruence in groups  but the section about Lagrange's Theorem went over my head, just barely out of reach.  The theorem just before Lagrange's was kinda confusing and that confusion carried over a little bit into Lagrange's Theorem too.