A particle of mass 3m moves in the lab frame with speed close to the speed of light and hits another particle with mass m which is at rest in the lab frame. As a result of the collision both particles disappear and two new particles of mass 2.5m each are created. What is the minimum velocity Umin required for the first particle so this process will be possible? O a. O b. O c. This process is not possible because there is not enough energy to create such new two particles. Umin = 0.81c Umin = 0.96c O d. The process is impossible since the final total mass (5m) is larger than the initial total mass (4m). O e. O f. Umin = 0.92c There is no energy conservation in this collision, so Umin is not well defined in this case.