a) Hydraulic Grade Line (HGL) and Total Energy Line (TEL) are very useful in the study of fluids through pipes. Illustrate the concept of Hydraulic Grade Line and Total Energy Line with a diagram and formula. b) A 600 mm pipe carrying 0.889 m/sec of oil (sp.gr. = 0.85) has a 90 bend in a horizontal plane as shown in Figure Q3 (b). The loss of head in the bend is 1.07 m of oil and the pressure at the entrance is 293 KPa. Calculate the resultant force exerted by the oil on the bend. P P Figure Q3 (b) (13 marks) (CLO3: PLO2: C4) X (17 marks) (CLO3: PLO2: C5) c) When dealing with engineering problems, it is desirable to obtain fast and accurate solutions at minimal cost. Based on your knowledge obtained from fluid mechanics study, demonstrate any improvement of concept in engineering solving problem.