Find a and as for the following geometric sequence. 25 4 2 5, 2. 5 25 an- n -1 2 (Simplify your answer. Type an integer or a fraction.) 25 (Simplify your answer. Type an integer or a fraction.)Find r and a, for the geometric sequence with a - 5 and ag - 625 r= (Simplify your answer. Type an integer or a fraction.) (Simplify your answer. Type an integer or a fraction.)Find the sum, if it converges. (0.3) k K =0 The sum is (Type an integer or a simplified fraction.)