Unpolarized beam of light of power 4 watt is incident on two polarizers in contact. The angle between the transmission axes of the two polarizers is 60 degrees. The light finally emerging from the combination is incident on the surface of a lake containing clear still water at an angle of incidence equal to Brewster angle. Find the power (in watt) of light reflected from lake water if normal to water surface at point of incidence of light and transmission axis of the second polarizer are in same plane.