<image> The image shows a 3x3 magic square. Please calculate and fill in the blanks.

(1) The sum of each row in the east-west direction is (____).
(2) The sum of each column in the north-south direction is (____).
(3) With 5 as the center, the sum of the three numbers, including the center number 5, in the southeast and northwest directions is (____).
(4) With 5 as the center, the sum of the three numbers, including the center number 5, in the southwest and northeast directions is (____).
(5) The pattern of this magic square is ________________________________________________________.