A composite shape is constructed out of a semicircle, a rectangle, and a triangle, as shown below. The moment of inertia for a semicircle about an axis colinear with its base is shown below. You may use without proof that the centroid of a semicircle is located above the base of the semicircle. 4r 3 y a Use the following values in your working out: b a = 0.9 m b = 1.1 m c = 2.2 m a) Calculate the location of the centroid of this shape with respect to the axes shown. (1 mark) b) Calculate Ix and Ixy for this shape. (3.5 marks) =