Calculate the correct answer:
Two blocks of masses 16 \(kg\) and 4 \(kg\) respectively lie on a smooth horizontal surface in contact with one other. They are pushed by a horizontally applied force of 8 \(N\). Calculate the force exerted on the 4 \(kg\) mass.
Force \(=\) \(N\)
[Note: Enter your answer with 2 decimal digits]