1. Evaluating definite integrals from graphical information. Use the following figure, which shows a graph of f(x) to find each of the indicated integrals. (Click on the graph for a larger version.) Note that the first area (with vertical, red shading) is 18 and the second (with oblique, black shading) is 6. A. S f(x)dx = B. f(x)dx = c. f(x)dx= D. f(x)dx=