Solve the all parts of given problem:
Problem: A system consists of three particles with these masses and velocities: mass 3.11 kg, moving north at 3.18 m/s; mass 3.88 kg, moving south at 4.86 m/s; and mass 7.02 kg, moving north at 1.88 m/s.
Part A: What is the total momentum of the system?
Part B: What us the direction?
I need help to determine the total momentum of the system.