<image>Each square in the diagram is composed of small squares with a side length of 1.

(1) Observe the figure, please fill in the following table: \frac{}\frac{}
(2) In a square with a side length of n (n≥1), let the number of red small squares be P_{1}, and the number of white small squares be P_{2}. Does there exist an even number n such that P_{2}=5P_{1}? If it exists, please write out the value of n; if it does not exist, please explain the reason.