4) 3 points Let B = 220 and a = a + 3, where a is a positive integer, represent the given parts of a triangle. Assume that the height is h = a. See figure. Next: a a) Circle all possible values for b so that 2 triangles will result. h = a b) Box all possible values of b that result in one triangle. c) If no triangle exists, do nothing. B a + 2 a+ a+ 1 a - 3 a