$7-2.$ A flow is defined by its velocity components $u=(4x^2+4y^2)\frac{m}{s}$ and $v=(-8xy)\frac{m}{s},$ where $x$ and $y$ are in meters.

An $x-y$ coordinate plane is placed in a stream of fluid. The $x-y$ coordinate consists of a vertical rectangle with its bottom left corner on the origin. The corners of the rectangle are labeled $O$ at $(0,0),A$ at meters, $0$