The following is a physics question. It has 3 parts but I have done part 1 which is question 11 --> the correct answer is 574J. I'm just having a hard time for question 12 and 13. thank you, I appreciate your help.

Four particles with masses 8 kg, 6 kg, 8 kg, and 6 kg are connected by rigid rods of neg- ligible mass as shown. The origin is centered on the mass in the lower left corner. The rectangle is 5 m wide and 4 m long. If the system rotates in the my plane about the z axis (origin, 0) with an angular speed of 9 rad / s, calculate the moment of inertia of the system about the z axis. Answer in units of kg - m2. 012 (part 2 of 3) 2.0 points Find the moment of inertia of the four-particle system about an axis that is perpendicular to the plane of the conguration and passing through the center of mass of the system. Answer in units of kg - m2. 013 (part 3 of 3) 2.0 points For the four-particle system nd the mo- ment of inertia about the y-axis, which passes through the two masses on the lefthand side of the system. 2 Answer in units of kg - m