binding energy Questions

The binding energy per nucleon of deuteron (${}_1^2\text{H}$) and helium nucleus (${}_2^4\text{He}$) is $1.1\text{MeV}$ and $7\text{MeV}$ respectively. If two deuteron nuclei react to form a single helium nucleus, then the energy released is:

If the binding energy per nucleon in ${}_3{\text{Li}}^7$ and ${}_2{\text{He}}^4$ nuclei are $5.60\text{MeV}$ and $7.06\text{MeV}$ respectively, then in the reaction ${}_1{\text{H}}^1+{}_3{\text{Li}}^7\to 2{}_2{\text{He}}^4$, the energy released is:

If $M_O$ is the mass of an oxygen isotope ${}_8^{17}\text{O}$, $M_p$ and $M_n$ are the masses of a proton and a neutron respectively, the nuclear binding energy of the isotope is:

The above is a plot of binding energy per nucleon $E_b$, against the nuclear mass $M$; $A,B,C,D,E,F$ correspond to different nuclei. Consider four reactions:(i) $A+B\to C+\epsilon$ (ii) $C\to A+B+\epsilon$ (iii) $D+E\to F+\epsilon$ (iv) $F\to D+E+\epsilon$ where $\epsilon$ is the energy released. In which reactions is $\epsilon$ positive?

A nucleus of mass $M+\Delta m$ is at rest and decays into two daughter nuclei of equal mass $M/2$ each. Speed of light is $c$. If the binding energy per nucleon for the parent nucleus is $E_1$ and that for the daughter nuclei is $E_2$, then: