7. (06.04 HC) The graph of the function f on the interval 0 s x's 9 consists of three line segments and the point (4, -4), as shown. It is given that ("(x)ex - -6 and [" g(x)cix =12. 5 4 3 X 21 0 1 2 3 4 5 6 7 8 9 10 Part A: Find the value of [of(x) dx, or explain why the integral does not exist. (3 points) Part B: Find the value of ( g(x) dx. Show the work that leads to your answer. (3 points) Part C: Find the value of [ [2g(x)-f(x)]dx. Show the work that leads to your answer. (4 points)