PLEASE HELP!!!! MY hw T.T?

Question

1a) Cherenkov radiation takes place when an electron travels faster than the speed of light in a medium. This is a relaivistic analogy of a sonic boom. Consider an electron traveling 12.6 percent faster than the speed of light in water. Determine its total energy in MeV. Answer in units of MeV

1b) Its kinetic energy in MeV. Answer in units of MeV

1c) Its momentum in MeV/c. Answer in units of MeV/c

Answer 1

E=mc2