I really need help on this question. I need it to be solved correctly because I have one more try. I really need help in solving a because it is still showing it's wrong.

ICE ANOTHER A 0.320 kg puck at rest on a horizontal frictionless surface is struck by a 0.220 kg puck moving in the positive x direction with a speed of 3.92 m/s. After the collision, the 0.220 kg puck has a speed of 1.30 m/s at an angle of 0 = 60.0 counterclockwise from the positive x axis. (a) Determine the velocity of the 0.320 kg puck after the collision. Express your answer in vector form, (2.3-0.7]) m/s (b) Find the percent of kinetic energy lost in the collision. 100 AK = 35.49 Additional Materials Reading