Answer
$$7.07 \mathrm{\ MeV}
$$
Work Step by Step
The binding energy per nucleon is
$$
\Delta E_{\text {ben }}=\Delta E_{\text {be }} / A=28.3 \mathrm{MeV} / 4=7.07 \mathrm{MeV} .
$$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.