need help w this problem please explain nice and neatly! thank you!

(4.2) A double-pipe heat exchanger consists of five hairpins connected in series. The hairpins are each 20 ft long with 4-in, schedule 40 outer pipes, 2-in. schedule 40 inner pipes and internal return bends. Nozzles are made of 2-in. schedule 40 pipe 40,000 lb/h of a petroleum fraction having the properties given below will flow in the annulus. Value Petroleum fraction property k (Btu/h ft. F) (cp) 0.15 2.0 3 0.80 PY 17.75 (a) Calculate the heat-transfer coefficient, ho for the annulus. (b) Calculate the total pressure drop, AP, for the annulus (c) What percentage of the total pressure loss occurs in the nozzles? (d) If schedule 40 pipe is used, what size nozzles would be required to keep the pressure drop below 7 psi? Ans.(a) 179 Btu/h ft.F. (b) 8.9 psi. (c) 41%. (d) 3.in. nozzles