Evaluate the definite integrals using properties of the definite integral and the fact that 2 4 -5. /2"f (x) da = 8, and /2 9 (x ) da = 6. (a) of (x) dx = 7 (b) f (x) dx = 4 7 (c) (f (z) - g(x)) dx = 7 (d) N (3f (a) + 4g(x)) dx =