4.) Water flows between two horizontal flat plates separated by H = 0.5 m with the linear velocity profile: V = 4y i. Determine the following: a.) Is the flow incompressible? Irrotational? b.) A relation for the stream function 4(x, y), assuming the bottom streamline at y = 0 is taken as = 0. c.) The flow rate Q in the channel, per unit width. d.) Both the x- and y-momentum flux per unit width in the channel. e.) The rate of angular rotation w (a vector) of a fluid x particle at y=H/2