$2.$ You start out by driving $231$ miles north in $3$ hours and $22$ minutes, and then you stop and park for a while. Finally you drive another $77$ miles south in $4$ hours and $12$ minutes. The average velocity for your entire trip was $16\mathrm{.}28$ miles per hour to the north. How much time did you spend parked? a$.9$ hour $27$ mins b$\mathrm{.}1$ hours $53$ mins c$.3$ hours $47$ mins d$.0$ hours $56$ mins $3.$ A rocket$-$powered sled moves along a track, eventually reaching a top speed of $151$ m$/$s to the west. It then begins to slow down, reaching a complete stop after slowing down for $2\mathrm{.}27$ s$.$ What was the sled s average acceleration and velocity during the slowdown phase? a$.66\mathrm{.}5$ m$/$s$^2$ east, not enough information b$.0$ m$/$s $^20.75\mathrm{.}5$ m$/$s west c$.66\mathrm{.}5$ m$/$s $^2$ west, not enough information d$.75\mathrm{.}5$ m$/$s $^2$ east $75\mathrm{.}5$ m$/$s east