$(4$ points$)$ Acceleration Air flows from a pipe into the region between two par$-$

allel circular disks as shown in the figure below. The fluid velocity in the gap

between the disks is closely approximated by $V=\frac{V_{0}R}{r},$ where $R$ is the radius

of the disk, $r$ is the radial coordinate, and $V_0$ is the fluid velocity at the edge of

the disk. Determine the acceleration for $r=1,2$ and $4$ m $,$ if $V_0=8\frac{m}{s}$ and

$R=2m.$