JEE Advanced 2022 · Paper 1, Physics question 2

The minimum kinetic energy needed by an alpha particle to cause the nuclear reaction ${}^{16}_{7}\mathrm N + {}^{4}_{2}\mathrm{He} \to {}^{1}_{1}\mathrm H + {}^{19}_{8}\mathrm O$ in a laboratory frame is $n$ (in MeV). Assume that ${}^{16}_{7}\mathrm N$ is at rest in the laboratory frame. The masses of ${}^{16}_{7}\mathrm N$, ${}^{4}_{2}\mathrm{He}$, ${}^{1}_{1}\mathrm H$ and ${}^{19}_{8}\mathrm O$ can be taken to be 16.006 $u$, 4.003 $u$, 1.008 $u$ and 19.003 $u$, respectively, where $1\,u = 930\ \mathrm{MeV}\,c^{-2}$. The value of $n$ is _____.