Take that a = 160 mm and b = 300 mm . Part A Determine the moment of inertia of the beam's cross-sectional area about the centroidal a axis. (Figure 1) Express your answer to three significant figures and include the appropriate units. Iz = Value Units submit Request Answer Part B Determine the moment of inertia of the beam's cross-sectional area about the centroidal y axis. Express your answer to three significant figures and include the appropriate units. Iy = Value Units Submit Request Answer Provide Feedback Figure 30 mm a 1 30 mm 30 mm 30 mm