Adam, Ben, and Cathy hold hands as they glide eastward at 4 m/s through the air in their wingsuits. On the count of three, each person pushes away from the group and goes off in separate directions. Adam heads east at 1.6 m/s. His mass is 74 kg. Ben heads southeast at 2.0 m/s. His mass is 86 kg. Take Cathy's mass to be 52 kg. Calculate the magnitude of Cathy's velocity after separation