$[10]$ During re$-$entry a space capsule $A$ is tracked by radar station $B$ located in the vertical plane of the trajectory. The values of $r$ and $$ are read against time and are recorded in the following table. Determine the velocity $v$ of the capsule when $t=40s.$ Find the acceleration of the capsule from the given data.

$\backslash$table$[[$t$,$ sec$,$r$,$mi$,\backslash$theta $,$ deg $],[0,22\mathrm{.}6,110\mathrm{.}5],[5,18\mathrm{.}6,100\mathrm{.}0],[10,16\mathrm{.}3,91\mathrm{.}0],[15,15\mathrm{.}0,83\mathrm{.}7],[20,14\mathrm{.}1,77\mathrm{.}7],[30,13\mathrm{.}0,67\mathrm{.}7],[40,12\mathrm{.}5,58\mathrm{.}6],[50,12\mathrm{.}0,52\mathrm{.}0],[60,11\mathrm{.}8,45\mathrm{.}0],[70,11\mathrm{.}7,38\mathrm{.}5],[80,11\mathrm{.}6,32\mathrm{.}8],[90,11\mathrm{.}6,27\mathrm{.}0],[100,11\mathrm{.}6,21\mathrm{.}6],[110,11\mathrm{.}7,16\mathrm{.}8],[120,11\mathrm{.}8,12\mathrm{.}0]]$

Figure $1$