I would like some guidance and a step-by-step procedure on how to solve this and I would Like it if you type in the answer but if you choose to guide me through the use of pen or pencil then make sure that it is legible.

5. A truck of mass 3.0 3(10'1 travelling at 25 mfs [55" E of S] collides with a second truck of mass 1.4):104. The collision is completely inelastic. The trucks have a common velocity of 13 mils [25 E of 8] after the collision. [4 marks] a} Determine the initial velocity of the less massive truck b} What percentage of the initial kinetic energy is lost in the collision between the trucks