Set up a definite integral that represents the indicated shaded area over the interval [a,b]. y=n (x ) y=f (x ) a b Choose the correct answer below. b O A. - [f(x) + n(x)] dx O B. [f ( x ) + n( x ) ] dx a a b O c. [f ( x ) - n( x) ] dx O D . n ( x ) dx b () b O E. [n( x ) - f( x) ] dx OF. f ( x ) dx a