A lambda particle () decays at rest to a proton and pion through the reaction

A lambda particle (Λ) decays at rest to a proton and pion through the reaction Λ → p + π⁻. The rest energies of the particles are: Λ, 1115.7 MeV; p, 938.3 MeV; and π⁻, 139.6 MeV. Use conservation of energy and momentum to determine the kinetic energies of the proton and pion.