Water flows at 7.2 m/h through the depicted horizontal diffuser which gradually enlarges from a d = 40 mm to a dx = 50 mm diameter pipe. Mind units and elementary knowledge. EGL (Bernoulli flow) di dz arbitrary reference plane 2g a) Calculate the head loss hu = C) and the resulting frictional pressure drop Apy of the dissuser. b) Assume that the actual energy grade line EGLact starts at the level of the given Bernoulli EGL. Please sketch the qualitative runs of EGLact and of the hydraulic grade line HGL into the figure. Mark all 4 components of the total head Hrot at the position of the diffuser. c) Say how the slope of EGLact changes while passing the diffuser, and why. Say how the distance between EGLact and HGL changes while passing, and why. d) Please give 2 reasons why for this type of gradual enlargement the application of the Bernoulli equation is less risky than for a sudden expansion