$1.$ A $3\mathrm{.}0$ kg object sits at $2\mathrm{.}0$ m west of a $5\mathrm{.}0$ kg object. A $2\mathrm{.}0$ kgobject sits at $2\mathrm{.}5$ m east of the $5\mathrm{.}0$ kg object. Find the center of mass of this system.