please help me with this physics question?

Question

Calculate the binding energy per nucleon for the following isotopes

64Zn

MeV/nucleon


7Li

MeV/nucleon

Answer 1

"mproton = 1.007825 u;
mneutron= 1.008665 u;"
E/m = "931.494MeV/u"

64 Zn

BE = (Zmproton + Nmneutron -mnucleus)c^2
(30*1.007825 + 34*1.008665 - 63.9291466)u(931.494 MeV/u) = 559.095 MeV

7Li

(3*1.007825 + 4*1.008665 - 7.016004)u(931.494 MeV/u) = 39.24477 MeV