The functions f and g are integrable and;
(2 →4) ∫ f(x)dx = 4, (2 →7) ∫ f(x)dx = -5, and (2 →7) ∫ g(x)dx = 2.
Use these to complete parts (a) through (e).

a. (4 → 4) ∫ f(x)dx
b. (7 → 2) ∫ g(x)dx
c. (2 → 7) ∫ 4g(x)dx
d. (4 → 7) ∫ f(x)dx
e. (2 → 7) ∫ [g(x)−f(x)]dx