The inner radius is Ri and the outer radius is Ro. The fluid is located between these two radii. The inner cylinder rotates with an angular velocity i , and the outer cylinder rotates with an angular velocity o. We will be working in cylindrical coordinates and we will assume the flow is incompressible, steady, and that gravity effects are negligible. (a) (2 points) What are the boundary conditions that the velocity vector u must satisfy at the surface of each cylinder? (b) (3 points) What variables (r, , z, t) do you think the solution depends on? Point to specific assumptions in the problem statement to justify your choices. (c) (5 points) Using results from 3(b), write the continuity equation and simplify it