can anyone help me im stuck on this Eureka Math Grade 4 Module 5 Lesson 22 Homework im tryna help my daughter with her homework and i dont really understand this new math

In the image, point a marks the center of the circle. which two lengths must form a ratio of 1 : 2? (options are in the images since thought they were harmful phrases)

Suppose you can spend at most $12. create an inequality that represents this restraint. then find at least three ordered pair solutions representing the number of boxes of candy and combos you can buy

If the circumference of the circle is below 72, what is the length of ab (the minor arc)