A 0.21-m-long, 0.15 kilogram thin rigid rod has a small 0.22 kilogram mass stuck on one of its ends and a small 0.080 kilogram mass stuck on the other end. The rod rotates at 1.7 rad/s through its physical center without friction. Obtain the magnitude of angular momentum of the system taking the center of the rod as the origin? Treat the masses on the ends as point masses.