<image>In a certain school, 1200 students participated in the district-wide "Classical Reading" activity. The school randomly selected some students to investigate their reading time in March and April. Below is a partial statistical chart created based on the survey data.
Based on the above information, answer the following questions:
(1) The number of students surveyed is ______ people;
(2) The values of \(a\), \(b\), and \(c\) in the chart are ______, ______, and ______ respectively;
(3) Among the surveyed students, the number of people whose average daily reading time in April falls within the range \(1 < x \leqslant 1.5\) is ______ more than the number of people in the same range in March;
(4) Estimate the number of students in the school whose average daily reading time in April exceeds 1 hour.
_____________________ Statistical Table of Average Daily Reading Time in April __________________________ 
 \frac{         } Frequency Distribution Histogram of Average Daily Reading Time in March 
