What is the adjective or adverb in the prepositional phrase devon wants to paint the pumpkin in the contest?

A prepositional phrase starts with a preposition. Given that the preposition in this sentence is the word in, the prepositional phrase is in the contest. The word it modifies is paint. 

Where does Devon want to paint pumpkins? In the contest. 

the answer:

in the first part of the story running is all that matters to squeaky. running gives her confidence and defines who she is. at the beginning of the story she says that other kids call her mercury because she runs very fast. in the text she refers to herself as "miss quicksilver".

the line that provides the best evidence that squeaky has self-confidence is

" and i continue with my breathing exercise, strolling down broadway toward the ice cream man on 145th with not a care in the world cause i am miss quicksilver herself".