<image>Several even numbers are arranged in rows of 8 numbers each in the form of Chart ①.

(1) What is the relationship between the sum of the 9 numbers inside the square frame in Chart ① and the middle number?
(2) Xiaohua drew Chart ②, and the sum of the 9 numbers within the diagonal frame is 360. Then, the middle number of the diagonal frame is ____;
(3) Xiaoming also drew a diagonal frame. The sum of the 9 numbers within the diagonal frame is 270. Then, the numbers within the diagonal frame are ____ respectively.