please include all equation, all steps , all units conversion. thank you

Fluid flows between two parallel plates separated by distance 2H. The velocity in the x-direction varies from the bottom plate to the top plate as Vx=Vmax[2Hy(Hy)2] If Vmax=0.7ft/s and H=6in, use integration to determine the volumetric flow rate for W=1 foot of depth in the z-direction. (The origin is at the surface of the bottom plate.). What is the mass flow rate (slugs/s) if the fluid is water