The mass of a muon is 207 times the electron mass; the average lifetime of muons at rest is 2.20 μs. In a certain experiment, muons moving during a laboratory are gauged to have an average lifetime of 6.85 μs. For the moving muons, what are (a)β(b)K, and (c)p (in MeV/c)?The rest energy of the electron is 0.511 MeV.