a. $$I_x = \frac{2592\sqrt{2}}{7}, I_y = \frac{648\sqrt{2}}{7}, I_0 = \frac{3240\sqrt{2}}{7}$$ b. $$R_x = \frac{6\sqrt{21}}{7}, R_y = \frac{3\sqrt{21}}{7}, R_0 = \frac{3\sqrt{105}}{7}$$