8.9. Consider the accumulation function A(x) = g(t) di, where g() is the func- tion whose graph is given below. g(t) 24 1 6 8 -1 -2 (a) Evaluate A(0), A(1), A(4), and A(8). (b) On what interval(s) is A(x) increasing? (c) On what interval(s) is A(x) decreasing? (d) On what interval(s) is the graph of A(x) concave up? (e) On what interval(s) is the graph of A(x) concave down? (f) Where does A(x) have a local maximum? Where does A(x) have a local minimum? (g) Sketch a graph of A(x)