Platinum consists of a work function of around 6.4 eV. Radiation having wavelength 150 nm and intensity 1.3 W/m2 is directed at the platinum surface. (i) Determine the maximum kinetic energy of the ejected electrons. (ii) When 1.0% of the photons hitting a 1.0 cm2 area of platinum eject electrons, determine how many electrons are emitted per second from that portion of the surface?