5) The cоmpоsite crоss-section shown hаs its centroid аt C аnd is made of a 6a x a rectangle on top of a a x 5a rectangle (a=30 mm). (a) Determine (6 points) (b) Determine the moment of inertia of the cross-sectional area of the beam about the centroidal x'x' axis. (9 points) (c) Determine the moment of inertia of the cross-sectional area of the beam about the centroidal yy axis. (5 points)