Climbers attempting to cross a stream place 340kg log against a vertical frictionless ice cliff on the oppsite side the log slopes at 27 degrees and its center of gravity is one third of its way along its 6.3m length. if the coefficent of friction between the bottom and the log is and the ground is 0.92 whats the maximum mass of the heaviest person who can safely ascend on to the top of the log without slippage?