<image>Below is the math problem translated into English with the  identifier retained:

Below is the statistical chart of the final math exam scores for Class 6(1). Answer the following questions based on the chart:
(1) The median score of the students in this class should fall within the range of ____-____.

(2) If a score of 90 and above is considered excellent, the excellence rate for this exam is ____%.
(3) Based on the data in the chart, the average score of the students in this class for the final math exam should fall within the range of ____ to ____ points.