Set up a sum of two integrals that equals the area of the shaded region bounded by the graphs of the functions f and g on [a, c] in the figure, Assume the curves intersect at x = bAy y = g(x) y = f(X) a b GOA. (f ( x ) + g(x) )dx - (f(x) + g(x))dx D O B (f ( x ) + g (x) ) dx - (f(x) + g(x))dx b a b C O C. (9 ( x ) - f ( x ) ) dx + ( f ( x ) - g ( x ) ) dx a bC OD. (f(x) - g(x))dx + (g(x) - f(x))dx a b