Atoms and Nuclei

An electron of a hydrogen like atom, having $Z=4$, jumps from $4^{\text {th }}$ energy state to $2^{\text {nd }}$ energy state. The energy released in this process, will be : (Given Rch = $13.6~\mathrm{eV}$) Where R = Rydberg constant c = Speed of light in vacuum h = Planck's constant