A neutron (mass 1.008 66 u) disintegrates into a proton (mass 1.007 28 u), an electron (mass

Question:

A neutron (mass 1.008 66 u) disintegrates into a proton (mass 1.007 28 u), an electron (mass 0.000 55 u), and an antineutrino (mass 0). What is the sum of the kinetic energies of the particles produced, if the neutron is at rest? (1 u = 931.5 MeV/c2.)