4. The masses and coordinates of four particles are as follows: 50g, x = 2.0 cm, y = 2.0 cm; 25g, x = 0, y = 4.0 cm; 25 g, x = −3.0 cm, y = −3.0 cm; 30g, x = −2.0 cm, y = 4.0 cm. What are the rotational inertias of this collection about the a) x, b) y, and c) z axes? d) Suppose that we symbolize the answers to a) and b) as A and B, respectively. Then what is the answer to c) in terms of A and B?