Two skaters, one of mass 50 kg and the other of mass 30 kg, initially at rest, stand together and push away from each other. The skater with mass 30 kg moves with a velocity of 1.5 m/s to the east. What is the velocity of the other skater? (Neglect friction on the surface).

a) 1.5 m/s to the east
b) 2.0 m/s to the west
c) 2.5 m/s to the west
d) 3.0 m/s to the west