The local amusement park is a popular field trip destination. This year the senior class at High School A and the senior class at High School B both planned trips there. The senior class at High School A rented and filled 11 vans and 4 buses with 277 students. High School B rented and filled 8 vans and 2 buses with 166 students. Every van had the same number of students in it as did the buses. How many students can a van carry? How many students can a bus carry?​