Evaluate the definite integrals using properties of the definite integral and the fact that 1 6 6 f(x) dx = -3, f (x) dx = 7, and g (x) dx = 5. 1 1 (a) 7f(x) dx = Number 1 6 (b) f (z) da = Number (c) J1 (f (x) - g(x)) dx = Number 6 (d) (2f (x) + 3g (x)) dx = Number