a$)$ Find the total binding energy and the binding energy per nucleon for $2861$Ni $($atomic mass $=60\mathrm{.}931056$u $).($b$)$ Would you expect $2861$Ni to decay by beta decay? Neighboring nuclei are $2961$Cu $($ mass $=60\mathrm{.}933458$u$)$ and $2761$Co $($mass $=60\mathrm{.}932476$u$).$ Calculations are not required for part $($b$),$ but you are required to explain your answer.