A particle of mass 1.0 g moving with velocity v1 = 3.0i - 2.0j experiences a perfectly

Question:

A particle of mass 1.0 g moving with velocity v1 = 3.0i - 2.0j experiences a perfectly inelastic collision with another particle of mass 2.0 g and velocity v2 = 4.0j - 6.0k. Find the velocity of the formed particle (both the vector v and its modulus), if the components of the vectors vl and v2 are given in the SI units.