The radius of the first permitted Bohr orbit, for the electron, in a hydrogen atom equals$0.51\stackrel{0}{A}$ and its ground state energy equals $-13.6 eV$. If the electron in the hydrogen atom is replaced by muon (${\mu }^{-}$) [charge same as electron and mass 207 ${\mathrm{m}}_{\mathrm{e}}$], the first Bohr radius and ground state energy will be,