i kind of need help answering a certain question on my math homework. can someone please help me!

here is the question. A teacher determined the median scores ans interquartile ranges of a score for a test she gave to two classes.

In class 1, the median score was 70 points, ans the interquartile range was 15.

In class 2, the median score was 75 points, and the interquartile range was 12 points.

Both classes has the same third quartile scores .

which range incdes only the number that could be 3rd quartile scores for both classes.

i don't understand what i am supposted to do. i also don't under stand what a interquartile ranges is. can any one help me?