Magnitude of block movement

Question

Assignment:

Block 1, of mass m₁ = 3.30  , moves along a frictionless air track with speed v¹  = 31.0 ^m/s . It collides with block 2, of mass m₂  = 15.0 kg , which was initially at rest. The blocks stick together after the collision

A.) Find the magnitude  of the total initial momentum of the two-block system. Express your answer numerically.

B.) Find , the magnitude of the final velocity of the two-block system. Express your answer numerically.