Pls answer all of them correctly. If you don't know or not sure, don't do it please.

1. A block of mass m = - kg, moving on a frictionless surface with a velocity of vii= m/s, collides with a block of mass M= = kg moving with v2 - - m/s, as shown in the figure. After the collision, mass m block recoils with a M M velocity of vif= m/s and mass M is moving with ver forward (+X). before after B= 15 a. Express initial momentum of the system in terms of M, m, v1; and v2;? (5points) b. Express final momentum of the system in terms of M, m, Vir and v24? (5points) c. Use momentum conservation to solve for v2f in terms of M, m, vif, and v2;? (10 points) D= 10 d. Calculate v2f velocity vector? (10points) e. Show whether the collision is elastic or inelastic by performing calculations? (15points) f. Calculate the impulse of mass m object? (10points)