4 particles with masses, 1 kg, 2 kg, 3 kg, and 4 kg are located in the coordinate at time 0 shown below. The velocities are 2i m/s, (3i − 3j) m/s, −1.5j m/s, and −4i m/s respectively. What is the total angular momentum of the 4-particle-system about the coordinate's origin.