<image>Mr. Wang conducted a statistical analysis of the scores from a mock exam taken by Class 9-1 of Hedong Middle School and created a frequency distribution histogram. Based on the chart, answer the following questions: (fill in the results directly)

(1) The class has ____ students;
(2) The frequency of the 89.5-99.5 range is ____ and the relative frequency is ____.
(3) Estimate the average score of this mock math exam for the class as ____.