How do I solve this?

Adrienne Beatrice Chloe v=0.99c > Axel Brad Clyde figure 7 Photograph taken by camera at the station (a) A high-speed (v = 0.99c) express train is traveling past the Pasadena station. Axel, Brad, and Clyde are standing in the station. Axel and Clyde are at the ends of the station platform; Brad is in the center. (Note that all observers are wearing high-priced, accurate [and precise] Swiss watches that have been synchronized in their own rest frame.) The proper length of the train is 100 m. What is the length of the train if measured in the rest frame of the station? (b) Axel measures the time it takes for the train to pass him, front to back. What does he measure? (c) Three observers are riding the train, Adrienne, Beatrice, and Chloe. Adrienne and Chloe are at the ends of the train; Beatrice is at the center. Each of them notices the time on Brad's watch as they pass him, along with the time on their own watch. Beatrice notes that both on her own watch and on Brad's watch t = t' = 0. What time does Adrienne observe on her watch and on Brad's as she passes him? (d) What time does Brad observe for Beatrice's passage