A block of mass 1.26 kg sliding with a constant velocity of 5.55 m/s to the north, which collides 100% elastically with

[answerhappygod]

A block of mass 1.26 kg sliding with a constant velocity of 5.55
m/s to the north, which collides 100% elastically with a second,
stationary block, of mass 4.22 kg, head-on, and rebounds back to
the south, eventually colliding 100% elastically with a wall and
rebounding northward. It then overtakes the second block, which is
still moving north as a result of the first collision. What will be
the speeds of the 1.26-kg and 4.22-kg blocks, respectively, after
their SECOND collision with one another?
1.) 4.95 m/s and 8.94 m/s
2.) 3.96 m/s and 2.81 m/s
3.) 3.89 m/s and 4.85 m/s
4.) 3.31 m/s and 0.76 m/s