$7)$ A solid uniform disk of diameter $3\mathrm{.}20$ m and mass $42$ kg rolls without slipping to the bottom of a hill, starting from rest. If the angular speed of the disk is $4\mathrm{.}27$ rad$/$s at the bottom, how high did it start on the hill?A$)3\mathrm{.}14$ mB$)4\mathrm{.}28$ mC$)2\mathrm{.}68$ mD$)3\mathrm{.}57$ m