1. A system of two particles of masses m, and my = 2 m, has the following conditions: r1 = (i+j+ k)m, r2 = (-i+ 2j + k)m, V1 = (21 - j + k) m/s, V2 = (1 - j + k) m/s. a) Find the center of mass of the system 2 points) b) Obtain the orbital angular momentum of the system (2 points)