You lay 250 feet of 2 1/2 hose from your engine to a dry standpipe on ground level of an apartment building. On the fifth floor you run another 100 feet of 2 1/2 from the standpipe connection, up 2 more flights of stairs to a gated wye. From the wye, you run 150 feet of 1 1/2 hose to a fog nozzle at the fire. To get 100 lbs. pressure at the nozzle, what will your pump pressure be?