What word describes the quadrilateral

In the figure dhg fhe which statement is true by cpctc

Which formula finds the probability that a point on the grid below will be in the blue area? p(blue) = total number of squares number of blue squares number of blue squares p(blue) = total number of squares number of blue squares p(blue) = number of white squares

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u