7.6 The figure for this problem shows a conduit whose cross section is the shape of an equilateral triangle. For the coordinate system shown in the figure, the equations of the three sides are Z+ b 2√3 b =0 z+√3y- 0 √3 z-√3y--0. Look for a solution for the velocity distribution in this conduit of the following form: b u(y, z) =α z+ 2√3 z+√3y- √3 b Z- Determine the value of the constant a such that the assumed form of solution is exact, with the value of this constant being expressed in terms of the applied pressure gradient. b Flow