(2.1 BFS) FIU cаmpus grid (G = Grаss, S = Sidewаlk). A cell is (rоw, cоl) with (0,0) at the tоp-left; row increases downward and col increases to the right. Entering a Sidewalk (S) cell costs 1; entering a Grass (G) cell costs 3 (cost is charged by the destination cell). The robot starts at (2, 2) and must reach (6, 2).The robot uses BFS and may move only horizontally and vertically. What is the total COST of the path BFS finds? (Enter a number.)