For the following fusion reaction, $4{ }^{1} \mathrm{H} \rightarrow{ }^{4} \mathrm{He}+2 \beta^{+}+2 \nu+\gamma$ the Q-value (energy of the reaction) in MeV (rounded off to one decimal place) is ____ . (Given: Mass of ${ }^{1} \mathrm{H}$ nucleus is 1.007825 u and mass of ${ }^{4} \mathrm{He}$ nucleus is 4.002604 u )
Answer
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