Is this allowed? Or will I get in trouble?

First time poster here (hello) so excuse me if this is a stupid question...I guarantee it will be confusing. I am going to be a junior at UCLA however I have been to 2 different colleges before I transferred to LA. We'll call these college A (fresh year) and college B (soph year). I get a 2.9 (26 credits) at college A due to numerous issues, none of which will pass as an acceptable excuse. I go to college B and get a 3.9 (41 credits). Now I have yet to take a class at UCLA (school C essentially) and will start this fall (in 3 weeks). I am a history major with no real finance work experience (worked on a couple of political campaigns) so I need all the help I can get coming from a non ivy.

Q1: Do I say I have a 3.5 or can I say I have a 3.9 and not tell them about school A and just give them the transcripts from school B?

Q2: If I can get a good gpa from UCLA my first quarter (ends early december) can I simply put that gpa on my application?

I know to hustle/cold call alumni and all that but I lack any real connections and am trying to see how many interviews I can get. I'll be applying to all BB and mid banks...just trying to get my foot in the industry.

Sorry if this is long/confusing and thanks for the help :)