An oil gusher shoots crude oil 25.0 m into the air through a pipe with a 0.100-m diameter. Neglecting air resistance but not the resistance of the pipe, and assuming laminar flow, calculate the gauge pressure at the entrance of the 50.0-m-long vertical pipe. Take the density of the oil to be 900 kg/m³ and its viscosity to be 1.00 (N/m²).s (or 1.00 Pa · s). Note that you must take into account the pressure due to the 50.0-m column of oil in the pipe.