I need help on the problems 10, 12, 14.

Suppose that f(x) dx = 2. ( f(x) dx = 3. g(x) dx = -1, and g(x) dx = 4. Use properties of definite integrals (linearity. interval additivety, and so on) to calculate each of the integrals in Problems 9-16. 9. 2f(x) dx 10. 2f (x) dx 11. [2f(x) + 8(x)]dx 12. 12f (s) + 8(s) ] ds 13. 12f(s) + 5g(s)]ds 14. 13f (x) + 2g(x)] d.x 15. 13f(1) + 28(1)] di