Mississauga G test

Hey everyone! My G test is coming up in a few days and I was wondering if there is any last minute advice anyone could give. I have done lessons with my instructor and I know a big part of it is observation.

My instructor told me to look at my rear view mirror every 5 seconds or so. However would it also be the same for side mirrors? Also when on the highway are they strict about staying in the right lane at all times?

Thank you!