There are several words that could mean someone you work with but the one that’s most common would be coworker. partner might also work but coworker seems the most fitting for this question. let me know if that helps at all.
Answer:The entire ride is the complete subject of the sentece. This implies all the words that describe who or what is the sentence is about. In this case, the action is take and we know that is about the ride, so the subject is ride.