Based on the evidence provided, readers can conclude that Rina is

unconcerned.
studious.
ambitious.
disorganized

Disorganized I believe is your answer for this question. Seeming how she:

Explanation:

After a few greetings to her friends, she unzipped her bulging binder and began to sort through its pages. She unearthed dog-eared worksheets, highlighted notes, and dated projects; alas, last night’s homework was not in the World History section where she had hoped it would be.

Taking from the context clues that are underlined.

1. this would be first person. it would be like "i walked home from school today" they are the narrator of the story and is a character as well.

2. first person because they used the word "i" in the quote.

3. i'm really not sure about this one i'm really sorry i never read it so i wouldn't know how to answer it. 

4. it would be character vs. society because everyone he meets there is always a conflict of some sort because he's stuck in his daydream.

5. it would be sadness at the loss of youth because the title itself tells us it's about age so it couldn't be about regret. and the tone just sounds sad, not angry. 

i hope this !

where are the anwsers