When a compact disk with a $12\mathrm{.}0$ cm diameter is rotating at $34\mathrm{.}6$ rad$/$s$,$ what are $($a$)$ the linear speed and $($b$)$ the centripetal acceleration of a point on its outer rim? What are $($c$)$ the linear speed and $($d$)$ the centripetal acceleration of a point on the CD that is halfway between its center and its outer rim?

Answers: $($a$)$ Blank $1$ m$/$s; $($b$)$ Blank $2$ m$/$s$2$; $($c$)$ Blank $3$ m$/$s; $($d$)$ Blank $4$ m$/$s$2.$