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(b) State whether the following statements are true of false. Also, very briefly mention the reason if the statement is false. [15] i. T F Surfactants increase the surface tension of water. ii. T F The Mach number of an aircraft cruising at a constant velocity in still air may be different at different beations. ii. T F Nonuniform heating can change the vorticity of a fuid element. iv. T F The value of mornentum correction factor is more for a turbulent flow than for a laminar flow. v. TF Gradual contraction results in greater minor loss coefficicut, than gradual expansion. c) Sketch the Energy Grade Line and Hydraulic Grade Line for the flow section strown below