<image>As shown in the , there is a cube with an edge length of 3cm. Each of its six faces is divided into 3×3 small squares, each with a side length of 1cm. An ant crawls at a speed of 2cm per second and starts from point A on the bottom face, moving along the surface of the cube. In order to crawl from point A to point B_{2}, the minimum time required is (___) seconds.