Electrons in hydrogen like atom (Z=3) make transition from the fifth to the fourth orbit and from the fourth to the third orbit. The resulting radiation are incident normally on a metal plate and ejects photo-electrons. The stopping potential for the photo-electrons ejected by the shorter wavelength is 3.95 eV. Calculate the work function of the metal and stopping potential for the photo-electrons ejected by the longer wavelength.(R H ​=1.094 × 10^7 m^−1 )