$3\mathrm{.}20$ m$.$ How far behind the front wheels is the center of mass located? $20)$ A$)0\mathrm{.}845$ m B$)1\mathrm{.}72$ m C$)1\mathrm{.}50$ m D$)1\mathrm{.}69$ m E$)1\mathrm{.}59$ m $21)$