Acetone at 25C is required to be pumped from a reservoir 3 ft below the pump suction line. The objective is to achieve a speed of 39 gal/min at 11 ft of height to a tank with a gauge pressure of 50 lbf /in2. The pipe used is 1 in with Standard 40 and with a friction in the suction line it is 3 lbf/in2 and in the discharge line it is 7 lbf/in2. The mechanical efficiency of the pump is 64. Consider the density of acetone to be 49 lb/ft3 and its vapor pressure at 25C to be 4.46 psia. Calculate its factor of safety (NPSHR) in ft to two decimal places and place