(i) Monochromatic light of frequency $6.0\times {10}^{14}\mathrm{Hz}$ is produced by a laser. The power emitted is $2.0\times$ ${10}^{-3}\mathrm{W}$. Estimate the number of photons emitted per second on an average by the source.
(ii) Draw a plot showing the variation of photoelectric current versus the intensity of incident radiation on a given photosensitive surface.