40 Points!! I have a deadline in two days and I'm struggling so much with this assignment, please help!

Part C
Given that a randomly chosen flight arrives in Los Angeles (LAX), what is the probability that the carrier is American Airlines (AA)?

Part D
Chicago has two airports (MDW and ORD). If you're flying with Delta Airlines (DL) and your primary concern is to arrive in time, is it better to fly MDW or to ORD?

Part E
New York City has two airports (JFK and LGA). If you're flying with United Airlines (UA) and your primary concern is to arrive on time, is it better to fly to JFK or LGA?