A constant-density fluid flows through a converging section having an area \(A\) given by

\[ A=\frac{A_{0}}{1+(x / \ell)} \]

where \(A_{0}\) is the area at \(x=0\). Determine the velocity and acceleration of the fluid in Eulerian form and then the velocity and acceleration of a fluid particle in Lagrangian form. The velocity is \(V_{0}\) at \(x=0\) when \(t=0\).