To learn to calculate energy and momentum for relativistic particles and, from the relativistic equations, to find relations between a particle's energy and its momentum through its mass.

Part A

Find the momentum p, in the laboratory frame of reference, of a proton moving with a speed of 0.750c . Use 938MeV/c2 for the mass of a proton.
This answer is 1064
Part B
Find the total energy E of this proton in the laboratory frame.
Please only detailed explainations.