The Total Binding Energy Is a Useful Property for Comparing $5.4$

The total binding energy is a useful property for comparing the relative stability of nuclei with the same number of nucleons, as in Table $5.4$ . For nuclei with different numbers of nucleons, as in Table $5.1$ , it is useful to compare the binding energy divided by the number of nucleons, $B / A$ .
(a) Calculate $B / A$ for ${ } ^ { 11 } \mathrm { C } , { } ^ { 12 } \mathrm { C } , { } ^ { 13 } \mathrm { C }$ , and ${ } ^ { 14 } \mathrm { C }$ .
(b) Discuss the relevance of the trends in the results for part (a).