Evaluate the definite integrals using properties of the definite integral and the fact that 4 9 9 f(x) dx = -5, f (x) dx = 8, and g (x) dx = 4. 3 4 4 (a) 10f (x) dx = Number 3 9 (b) f (x) da = Number 3 9 (c) (f (x) - g(x)) dx = Number 4 (d) (2f (x) + 3g (x)) dx = Number