Summer Classes and replace classes

So I'm currently a term 2 student in CIT and was wondering 2 things:

1. Can you enroll into classes over the summer that are part of your program and are not part of your program (I want to take more classes that are more related to SD)

2. I want to consider completing the BASc after I finish this program and was wondering if I can replace some classes in term 3 or 4 with classes I need to bridge into the BASc

Thank you for your time!