<image> The image shows a statistical chart of TV programs preferred by teachers at a certain school.
(1) What percentage of teachers at Shiyan Elementary School prefer the program "Into Science"?
(2) There are 20 more teachers who prefer "Big Windmill" than those who prefer "Focus Interview." How many teachers are there in total at Shiyan Elementary School?
(3) How many teachers in total prefer "News Broadcast" and "Into Science"?