calculate the b. e. / nucleon of

¹⁹⁷₇₉Au if its atomic mass is 196.96 amu.
¹
(Use Mass of proton mp=1007276 u, mass of 1H atom= 1.-7825 u, Mass of neutron mn =1.008665 u, mass of electron = 0.0005486 u≈511 keV/c², 1 u = 031 MeV/c²)