the following is a physics question. Thank you in advance!

Four equal masses m are so small they can 1. 7 me2 be treated as points, and they are equally spaced along a long, stiff wire of neglible 2. 3 me2 mass. The distance between any two adja- cent masses is l. 3. 5 me2 -+ e 4. 4 me2 m m m m What is the rotational inertia Icm of this 5. ~ me2 system about its center of mass? 6. 6 me2 0 7. 2me2 8. me2