4 The functions f and g are integrable and f(x)dx = - 8, f(x)dx = 4, and g(x)dx =2. Use these to complete parts (a) through (f) 2 2 2 a. f(x)dx = 0 4 (Simplify your answer.) b. g(x)dx = - 2 7 (Simplify your answer.)C. 2g(x) dx = 4 2 (Simplify your answer.) d. f(x)dx = 4 (Simplify your answer.)