If the three particles of masses m_{1}, m_{2}, and m_{3} are moving with velocity v_{1}, v_{2}, and v_{3} respectively, then the velocity of the center of mass is.

1. \(\frac{m_1v_1+m_2v_2+m_3v_3}{m_1+m_2+m_3}\)

2. \(\frac{v_1+v_2+v_3}{m_1+m_2+m_3}\)

3. \(\frac{m_1v_1^2+m_2v_2^2+m_3v_3^2}{m_1v_1+m_2v_2+m_3v_3}\)

4. None of these