Poiscuille's Law. The speed of blood in a vessel is given by
$$V(L, p, R, r, v)=\frac{p}{4 L v}\left(R^{2}-r^{2}\right)$$
where $R$ is the radius of the vessel, $r$ is the distance of the blood from the center of the vessel, $L$ is the length of the blood vessel, $p$ is the pressure, and $v$ is the viscosity. Find $V(1,100,0.0075,0.0025,0.05)$