Please help to solve and explain

Evaluate the definite integrals using properties of the definite integral and the fact that 3 8 8 f(x) dx = -5, f (x) dx = 12, and g (x) dx = 2. 3 3 3 (a) 6f (x) dx = Number 3 8 (b) f (x) dx = Number 3 . 8 (c) (f (a) - g(x)) dx = Number J3 8 (d) (2f (2) + 3g (x)) dx = Number 2