<image>【Problem Statement】In a health knowledge test conducted by a middle school in Tongren City, a sample of student scores (scores are integers, with a full score of 100) was taken to draw a performance statistics chart, as shown in the figure. Please answer the following questions based on the statistical chart:

(1) How many students were sampled in this test?
(2) How many people scored in the range of 90.5 to 100.5?
(3) Estimate which score range the most frequent score falls into in this test?