A beam of light has two wavelengths of $4972\,\text{Å}$ and $6216\,\text{Å}$ with a total intensity of $3.6 \times 10^{-3}\,\text{Wm}^{-2}$ equally distributed among the two wavelengths. The beam falls normally on an area of $1\,\text{cm}^2$ of a clean metallic surface of work function $2.3\,\text{eV}$. Assume that there is no loss of light by reflection and that each capable photon ejects one electron. The number of photoelectrons liberated in $2\,\text{s}$ is approximately: