Water flows down steadily through a long 10-cm diameter vertical pipe. At the inlet: p = 300

Question:

Water flows down steadily through a long 10-cm diameter vertical pipe. At the inlet: p = 300 kPa, T = 50oC, V = 5 m/s, and z = 125 m; At the exit: p = 1250 kPa, T = 20oC, and z = 10 m. If the surrounding ambient temperature is 10oC, use SL model (ρ = 997 kg/m3, cv = 4.184 kJ/kg.K) to determine the
(a) Velocity at the exit in m/s.
(b) Mass flow rate in kg/s.
(c) The rate of heat transfer in kW.
(d) Rate of entropy generation in the pipe's universe.