Please help! It will be greatly appreciated!

5.2: Problem 6 (1 point) You are given the four points in the plane A : (6, 0), B : (9,1), C : (12, 7), and D : (16, 5). The graph of the function f(ac) 16 consists of the three line segments AB, BC and CD. Find the integral f(a:) da: by interpreting the integral in terms of sums of areas of 6 elementary figures. 16 ne) dm :8. 6