6 10/10

1. 5.2

2. Rederive the results of question 5.2 by writing integral continuity for the region between two cylinders, respectively two spheres, of radius $r_0$ and $r$.

3. 5.6. Hint: take the curl of the equation and simplify.

4. 5.7. Multiply the momentum equation by $v_i$ and simplify.