Need help with these Pronoun Case examples

Test Preparation SAT Preparation
1

<p>My friends and (I) took the train downtown.( Why is I is Subjective Case?)</p>

<p>(She) and I worked on the group project together.(Why is she in subjective case?)</p>

<p>The crowd pushed Cesar and (me) onto the stage. (Why is me in the objective case?)</p>

<p>Can someone please throughly explain these examples please.</p>

<p>I know that pronouns have to be consisted with the function they perform in a sentence.(Subject, Object and Poessesive.)</p>

2

<p>Plus why would you change more busy to busiest in “Farid is more busy than Wesley is.”</p>

3

<p>Bump…, comon guys you know this</p>